Orgasms

Alyssa
So I've been with my SO for 2+ years now. We are both 18 y/o, in love, high school sweet hearts, and need advice on making me orgasm. Unfortunately we have not been successful the entire 2 years of being intimate with eachother. 
I have been able to cum by myself through masturbation but never by him. What I don't understand is that it's not that he doesn't feel good when having intercourse I just can't get to the full climax, I always feel like I'm so close. We've tried him eating me out, rubbing my clit, plying with my boobs, my ass, sooooo many different positions and nothing seems to work. 
I'm desperate and really don't know what to do at this point. He's starting to get discouraged because he thinks that he can't please me and it kinda puts a set back in our relationship because the pleasure isn't being evenly distributed. 
Any advise would help please. 
This is us by the way❤️