<human>: I'm using the mobile app and I don't know how to flair, so I did it in the title. 

My boyfriend (m) and I (f) are both 18. We've been together for almost 8 months. My ex (m) is 20 now. 

We dated for a year and a half, our relationship ended in January of last year. We had a long distance relationship and he cheated on me 9 months into it. Before this happened, everything was great, but after, it was terrible. We broke up for a month but then got back together. Constant fighting until March when I finally ended it for good. 

He had a bad relationship with my family and friends after he cheated on me. I guess what I'm trying to get at is he is not the best, and I don't know why, but I felt so loved by him (when I'm not thinking about him holding another girl). He is also the first person I had sex with. He is much bigger than me physically and is a dominant type.

My current boyfriend is amazing and I love him very much. He's been helping me through depression and other things even before we started dating. He's open to new things, but is not very dominant. I'm mostly submissive so I do a lot regarding initiating things in the bedroom. My boyfriend has a great relationship with my family and friends. We've had sex, but I can't help feeling that it's so different than with my ex. My boyfriend is about the same size as me (he is 5'5" I'm 5') pretty skinny. It's different. I get that it will be, he's a different person, but at times I miss that feeling of being small in someone's arms. 

My ex and I no longer have any contact with each other and haven't for the last 6 months. I know I shouldn't have feelings for him still, but I do. I don't think it's love. It feels more towards longing and missing but the love is gone. I don't understand it, but that's how it feels.

Provide a brief overview of the text.
<bot>: I have feelings of longing for my ex, but I've been in a relationship for 8 months. I don't know whether to tell him or not nor how I would tell him.