Am I the ass hole for breaking up with my boyfriend?

So my friend lets call her Lexi, me and Lexi have been friends for around 3 years but we where never like best friends close, we met in the 7th grade and from them on, after we finished the 7th grade Alexis brother max (not there real names) joins and he is in 7th grade and I'm in 8th now, we talk but I have a boyfriend at the time, and Lexi comes up to me one day and tells me that Max likes me and I should break up with my then boyfriend, I say I don't date my friends siblings and she drops it for like a few days but keeps bringing it up. After a while then boyfriend breaks up with me for some reason (I still dk why) and I of course am sad then randoml number texts me, it's max, who texted me, it's around February 18 or 20th from what I remember where we would talk a little bit I didn't really have a crush but I liked him as a person yk. Then a dance comes up and he asks me to go with him AS FRIENDS. It wasn't very friendly to ask me out, and keep in mind his sister is kinda scary, and I felt like I had to say yes, then we start dating, until like June and that's when school ends and he breaks up with me because idk why, I text Lexi and she says sorry for him, Summer passes and it's school time again in September, fast forward to the week before Halloween or something in that time line, and max gets picked on for his Halloween costume, it was an inflatable among us thingy, it was cool and whatever, lexi finds out and she is pisses,and I being the nice person I am tell him I will help fix that, I find the guy and yell at him because i am nice, on fucking Halloween he texted me saying he wants to get back together, I was already stressing with helping my little sister, and I started crying and so out of everything I said yes, then we are back together, I'm still not happy but after a while I catch feelings, then a few weeks ago I lose feeling again and I not wanting to lead him on break up with him, and Lexi was getting mad at me for doing that and I am starting to feel guilty but I knew we wouldn't work out in the end, so am I the asshole?