Problems

Ok...so not sure if this is a share post or a I need help/advice but here is my situation. I had been dating a guy for 3 years we broke up last February. In the last few months we have been in what is basically an open relationship. For the first month it was fine. Now I say open relationship because it’s most accurate but we haven’t actually talked about it. We do everything like we are dating including I basically live with him and our dog but we can have sex with whoever and we talk about it. We want to be together but we have clear issues (mostly around finances) that make it difficult. We now fight about what we are doing. Because: bottom line I love him. I go to college in a different city not too far and miss him and cry when I have to leave. I want to tell him everything about everything. I love hanging out with him and He is my ultimate best friend. But. He wants to have sex all the time and I just can’t. I mean I literally push him off and it turns into like a joking wrestling (which I’ve now done 3 times) and we don’t have sex. I don’t know if I am not attracted to him or what is happening but I do know i have this other guy i sleep with and I can’t get enough but personality wise we aren’t compatible. So it’s not like I have a low sex drive...just I can’t with him. Yea...I don’t know what to do with this.