<human>: Mine would be the first person I ever really "fell in love" with. This was like 6 years ago too. It's usually a song coming over the car radio from that era (2009-2010) that will make me think about him. Or a song relevant to that situation - today it was "Mine would be you" by Blake Shelton. Other boys came and went, and I've been in a happy relationship for the past few years. But from time to time my thoughts always drift back to this one individual from 6 years ago. 

I always wonder what happened to him, and sometimes I wish I could talk to him again. For whatever reason, my thoughts always drift to him, but not any other past love interest. Then I feel guilty cuz I'm very happy in my current relationship and it's been 6 years.... I'd never give up my current boyfriend and I think he's probably the "one", but sometimes I can't help wonder about the first one, and if he ever thinks about me... if I left an impact at all on his life. He could be an asshole at times and things were pretty toxic, but I guess a part of me always remembers the addictive warm fuzzies associated with caring about someone in that way for the first time. I seem to forget the consequential months of tears and pain after it. 

Anyone else have that one ex that you inadvertently think about every now and then?

Can you summarize the given text in a few sentences?
<bot>: 24F, still think about a boy I used to care about 6 years ago every now and then, while in a really good relationship now and feeling guilty.