I feel bad

Past 2 months I met the best friend of the guy my friend was dating. We were texting, then we met and then he became the first guy I had sex with. We continued talking and stuff, I told him about everything that he was my first and that I didn’t mean to give him a bad impression. He told me to give him the chance to get to know him, then I traveled with my friends and I had a huge event and he didn’t go, he felt bad and called me next day I woke up at the hospital and i literally lost it; i texted him that I really didn’t understand the way he was and that I thought it was just not going anywhere he told me he was down to talk about it, but he literally blocked my number... I don’t really know how to feel about this, I just feel I always do something bad; I texted him that it was okay that he just dontcare and stuff and he left me on read (this was on ig) I feel so bad but I act like nothing happened... I just don’t know if it’s me...