I miss my exes sex what should I do

So I’ve been dating a guy now for about a year but I just recently stopped talked to my ex for good and the guy I’m with knows everything because it was a emotionally abusive relationship and my boyfriend now got me away from him but it did take a long time.I haven’t touched my ex in over a year but I can’t lie and say I don’t think about sex with my ex he was the guy that took my virginity he was bigger and was way more into it and rough with me my boyfriend now dosnt really fuck me? And he’s a lot smaller and has issues staying hard because he’s had a lot on his mind lately about work related stuff but I’ve never had fulfilling sex with him ever and I’m not super attracted to bigger guys and my boyfriend now is.My ex was but lost a bunch of weight.In every other way I hate my ex and love my boyfriend with everything in me he’s a great guy I just don’t know what to do and no I’m not cheating or attempting too but it makes me really upset I’m not going to be getting satisfied like that anymore…idk what to do