Relationship sucks

So I have been in a relationship with my bf for almost 5 years.. over the past year I feel as if we never have sex anymore and if we do I’m the one who has to initiate it, we are both 22, and I don’t know how else to say it, but I LOVE sex, like I crave it and I don’t know what to do in this situation, I have always been like this, he is my first partner and I’m just confused, with the lack of sex. obviously I’m not going to force him, but it makes me really upset when I try and I constantly keep getting “no”. Having that moment with him, makes me feel love and wanted. When I don’t get that, it causes me to become angry with him and myself & always having thoughts of not being good enough or wanted by him… But when I’m not in the mood he expects me to just give it up.. P.s. Watching porn and doing it myself doesn’t help at all.