Being ghosted

I (24 f) just got out of an 8 year relationship (25 m) a couple of months ago. One of our friends (25m) from high school/really early college reached out to me to check in because he heard about the break up. We would spend hours on the phone and he (we’ll just call him bill) would let me confide in him about my most personal thoughts regarding the break up. The phone calls with bill went on for months and every now and then he would be flirty, but I didn’t think anything of it. A month ago Bill FaceTimed me after I had a night out with friends. He kept complimenting me and one thing led to another and drunk me “showed him things” on FaceTime. For the next week Bill started to confess that he has always had a crush on me and brought up things from the past where he “was falling in love with me” that I had forgotten about. Example: he got his first apartment and I went grocery shopping with him and taught him how to cook basic meals. He made me feel really seen. Towards the end of the week we were texting all day and he was telling me that he wished he would’ve shot his shot sooner and was fantasizing about where we would be in our relationship now if he had. He went out a week ago and I got a Snapchat of him telling me how attractive he found me and I snapped him back. One week later he hasn’t even opened it, I’m blocked on iMessage, Facebook, instagram, and TikTok. I’m honestly so confused and have no clue what happened. One day he’s telling me that he wanted to marry me and I’m the woman of his dreams- then boom I’m ghosted and blocked on everything. I have never been ghosted before, but this sucks and I wouldn’t wish it on anyone. Can anyone tell me what I may have done wrong?