Help Sex

So my and I fiancé aren't having sex. Our chemistry is next to none. The sex is just not good... he has a hard time getting hard due to high blood pressure. And I try to avoid sex, because its just not enjoyable. We either sit there awkwardly waiting for him to get hard or he gets soft quickly during sex. Sex is uncomfortable because its not much down there so it doesn't hit any hot spots. And we can't do a lot of positions due to his weight and him not being able to stay hard. I don't have anyone I can talk to about this. We have (him and myself) have talked about the issues SO MANY TIMES... We have tried toys all of which he is uncomfortable with and feel emasculated to use. We are thinking sex therapy next. I am very very uncomfortable with where we are right now. I love sex just not with him. When we first got together we had sex a lot, but I feel like that was because it was new. I want more. I want so much more! Any words of advice welcomed. I just needed to vent