Something I’m having issues with lately.

So I’ve been with my boyfriend for working on 5 years now and we live together now. One thing when it comes to intimacy is that he is super uncomfortable giving oral, the thing is that I’ve never received oral before and really want to try it. We’ve tried everything flavored lubes, whipped cream, etc... He can’t even really tell me what exactly makes him uncomfortable either and I’m getting really upset by this because I’m always open to trying things with him and he isn’t. We talked about introducing ourselves to other people for intimacy but honestly I haven’t had much luck with girls because I feel like I was being tolerated so they could get with my boyfriend. Now I’m trying to maybe introduce a boy who is willing and my boyfriend feels territorial over me with guys. Like I’m getting tired of everything, a bitch just wanna get ate out. Can someone give some advice maybe?