18 year old girl no one has ever liked - how do I know if they’re into me? Help!!!!!

For context I’m 154 cm I think a bit chubby and I hadn’t been clubbing before so I didn’t wear. Sexy outfit jsut some slightly loose jeans and a tight shortsleeved top.
I am an 18-year-old girl who has never really even spoken to a guy or any kind of relationships or anyone have a crush on me or be interested in me. University four days ago and have been experiencing precious week and freedom for the first time firm super controlling religious parents.
I tried loving the first time ever was back in line in university and I experienced it completely sober as I have before and wanted to make sure I stay safe as I did not know that I was going with very well as we had all just met that day from our university. We started dancing and a very busy and back to club that was full of other freshers from different colleges of our university. I had a guy standing behind me shout my friend asking what is your friends name and my friend replied and told him my name so I turned around and chatted with him but it was so noisy we stood super close and touching and I had to scream in his ears. He kept looking at me and smiling and later on needle he was really drunk although I was not able to tell that he was drunk because I had never been around drunk people or I drank alcohol by myself ages on a lot of things and we felt a lot of things eventually it was so hot, that we went upstairs it was cold and quiet so we went upstairs. We talked for another hour standing up. Completely full attention for at least two hours in total and I’m not sure if this was because he was genuinely interested in me and like me or because he was friendly or because he told me before all his friends from his college when he was talking to initially his friends were still around. At the start when he asked my boyfriend my name my friend stood for two minutes and watched us talk and then she told me that she was going to get some water and she went to get water and she never came back. I am not sure this is because she forgot to come back because the club was grounded or if she told that guy like you but I cannot, wanted to give us some space separately. my friend again when she was sleeping as she came in the entrance where I was standing with the guy and told me she was leaving so I told her I was going to stay belong because I see he put up with the guy which I didn’t know her and she would be fine and make it back to university I said that I would. I want one. I am not sure if he was just being that he was going to get another drink and that was if I wanted to take it when I could buy one or if he was offering to buy me a drink he asked me. I didn’t know this guy and I didn’t normally back out so I had my phone was dying so I wanted to stay asleep and not be too risky in a city that I live in before. We went back downstairs and climbing down and he dripped on the stairs while I had already climbed down the stairs and he was slowly so I reached out and asked if he needed help and I think I touched his arm but he said he was ok. We then went back upstairs and stood outside the club as it was really des downstairs and everyone was leaving. He then open drop me back to my college even though he was very very drunk and was struggling to walk properly so I told him it was okay and then I would make my own way back, but he insisted and said that he would walk me back and whenever I asked if he was sure as his college wa sin the opposite direction far away, it was 3am and he was having trouble he walking, he looked genuinely suprised that I was surprised he was walking Me back and said what do you mean? Am I sure of course illl walk you back and he said that several times. I have never had experience with the drunk person conversation however about him he seem to be making a lot of coherent sense said a lot of the things that we were talking about when I told him anything he said that it was really impressed. He felt really cool and every time he was stumbling which I couldn’t even notice, he said oh this is so embarrassing I’m so drunk. I admitted to him is a sober and he said that it was so embarrassing that he was so drunk when I was totally sober so he was embracing himself. Which he wasn’t. He dropped me all the way off back to my college even though I went the comoemege wrong way so I made him walk like 15 mins extra and then he said it was so nice to meet and that he hoped we’d meet again and there was this awkward split second where I wanted to kiss him goodnight so badly but I wasn’t drunk or brace to do it and idk if he has a girlfriend and I don’t think anyone would have a crush on me anyways. He was so cute and we exchanged insteagrams although I can’t seem to find it anymore and I don’t remember his name or college but I do remember his degree and the personal anecdotes he told me. Idk if he was into me or jsut drink or jsut polite or even if he could have been gay? He didn’t seem gay but idk. Please tell me!!
Two nights later, I’m gonna do another club at this time. I had five sips of beer, which was my last time having alcohol. Later on this random guy from my college who I never seen or spoken to before as this is still this week I don’t remember how this happened ended up taking my hands fingers and we swayed and we danced and did this twice. he was a little bit early looking with glasses and baby braces but he was very tall so I couldn’t see his face as I was avoiding like as I was nervous embarrassing which some of my friends were whispering about about I think but maybe that’s just my paranoia. I don’t know if this guy liked me or not I can’t tell. I think I’m reading into this too much but I’ve been so incredible as I never even been here before, I improve so I end up kissing a guy. How do I get to Me and how do I know or not? Buy me a drink or told me that the only place people buy him drinks? Is that gay even though he not always going there because they are free drinks so does that mean if someone drink me a drink they like me, so much so excited really really really want to have my first kiss.