Very sexually frustrated

My ex cheated on me. Only man I've ever slept with and also the first to ever touch me. Also my first kiss. Im18 years ago. Just started dating a year ago. Anyway, long story short as you can tell I do not give up my vagina very easily. But he cheated on me and I'm very sexually frustrated. I can't ask him for sex obviously, he cheated on me two times and I found out all at once. (Caught him red handed then when I told some people they ended up confessing that he slept with someone else before and telling me late because they were too scared to before, yeah ...) anyways, dildos feel terrible and I hate fingers. I don't have any close guy friends except this boy who isn't my cousin but I refer to him as my cousin. Not related, just met him a year ago, and everyone does believe we are real blood related cousins and sometimes I forget he isn't nowhere near my cousin . Should I ask him for sex 😳 I don't even know... at this point I'm crazy in the mind because I'm super sexually frustrated