Is it really a rejection from her after I asked her out?

So today I asked out this girl who used to be in the same school as me but not in same classrooms. Now she is 22 and I am 23 and we both graduated college 10 months ago but now she works in another city whereas I am pursuing MBA in my city and I am in 1st year. We have been chatting on Instagram since June 2023 but not very regularly because of her busy work schedule. I am not expecting a relationship as I don't want a long distance relationship. But she came to my city yesterday to meet her family and will stay for a week so I just decided to ask her out just to hang out. So I texted her asking her whether we can hang out a bit on some day. But she replied this "I'd really like to. Maybe next time we can. Maybe not this time." So I respected her wishes and replied "Yeah sure. It would be really nice to hang out with you some day as you are really sweet and seem fun to hang out with". But is that really a rejection from her? She has been friendly always.
Anyways I am sure many will say she isn't interested in me but what can I even do if no girl ever was interested in me. I have crush on this other girl in my Uni too who is within 21-23 age range and even got her number recently but she didn't even read my Whatsapp text yet. I also got ghosted my another girl who is 20 now and I have been knowing her for 8-9 months and chatting on Instagram regularly. Got rejected both directly and indirectly by my other crushes too whereas I was also shy to ask out some of my crushes but they too obviously weren't interested in me either. I only had one first date 7 months ago and even that girl lost interest and blocked me and she basically used me for free lunch in the date and to take lots of pics of her so she can post on social media. What can I do if no girl is interested me and its always a one sided love/crush by me?