AITA for randomly losing interest in this guy, then liking his friend..?

I talked to this guy for like 3 weeks. We went on about 5 dates and we got pretty comfortable with eachother, cuddling but we never did more than that. From the start I knew I was never going to love him, and honestly just wasn’t that attracted. But it got to the point where i literally couldn’t even ignore the icks I got and was straight with him. Told him I only see us as friends and he was really understanding, and we have been friends since then and it hasn’t been awkward or anything. We are in a friend group so we are still in contact. I have had people tell me I am a horrible person for doing this to him, one of his friends has called me everyday to tell me to end it, go to hell ect. Well I wouldn’t even consider them friends, both me and the guy were upset over this because he honestly didn’t care that much about me losing interest. I guess I want to know if I’m the asshole for this, and if I deserve this treatment. Now for when it gets into sketchy territory, I REALLY like his friend. His BEST FRIEND.. we have only been on call w eachother a couple times in a group setting and we interact a lot through the guy i originally knew. I sent him a request on snap since we were in a gc together and figured it wasn’t weird but he hasn’t added me back. AITA for this? And would this be realistic to think I could have a chance at a relationship w him?