He Doesnt Satisfy Me Anymore

So I've been in a relationship with my boyfriend for 2 years now and sex has become less and less frequent, despite my efforts. I suck him off but he just wont pound me like he used to. I'm into girls too and have found myself wanting to be with a girl or honestly anyone who seems even remotely attracted to me. I love him, but I think he's depressed or something. I have mh issues myself so I dont want to set myself back because he isnt doing well. What to do? I feel so unsatisfied.