It was my 18th birthday yesterday and I got lots of lovely birthday wishes from people, even people I'm not super close to. However, one of my good friends didn't even bother texting me to say happy birthday, even though he knew it was my birthday. He's at home at the moment from uni and his sister, who I'm not as close to, wished me a happy birthday but he didn't. I mean, he even got a Facebook notification about it. Is it stupid to be upset about this? I normally wouldn't care, but we have a bit of a history, which I've explained below. Thoughts??
(Backstory - you can skip this if you want: I've known my friend for about 4/5 years now - I was best friends with his sister first, and then we got closer so I'm now actually closer to him than I am to his sister. I've liked him for a while (3 years, maybe?) but nothing's ever happened so I just assumed it would never be a thing. Anyways, last summer things progressed and I got the sense that he was finally seeing me in a new light - i.e. not just as a friend. There was a lot of flirting and we spent more time together than we did apart.
After summer I didn't see him for about 5 months because he went off to uni, but we continued to message each other on a regular basis. I was the one who initially suggested a meet-up, and he agreed so we met up and had a nice chat + food. After that, he asked me out for another meet up type thing, which I agreed to until he cancelled on me at the last minute with pretty much no explanation. Naturally, I was upset but after that, we didn't speak much for a bit. He used to be the main initiator of conversations, but he just didn't bother for a good 3/4 weeks. I then messaged him a few days ago and he was quite cold and not his usual self - I'm not sure what to make of this.)