<human>: Sorry in advance for the length & thank you to anyone that offers advice! I'm posting this in r/relationships because I'm hoping to get relationship advice & not sexual advice, thank you! 

My boyfriend and I get along really unbelievably well. He's wonderful, driven, and always fun to be around. He's one of the absolute kindest people ever & everyone loves him (especially me). We feel lucky to be dating each other and we have really grown better together throughout the course of our relationship. 

My only issue is that, for mostly mental reasons (he puts a lot of pressure on himself), he can not stay hard & thus we have not been able to have sex more than a handful of times throughout the 3 years that we have been dating. I've always had to encourage him to work on this issue (suggested therapy, ect) and I have been understanding and supportive as much as I possibly can be. 

I have tried to not let it affect my self esteem (though for brief moments it as), but I do feel like I am always that one that has to bring up working toward a solution and I just don't understand what's going on. When I do bring it up and we're able to discuss it together, he is truly wonderful. But, his solution often involves "just keeping at it until it works," and it's difficult for me to keep wanting to do that after it has failed so often.

We do want to work on this together, but part of me is honestly just tired. Sex is an important part of a relationship for me & we don't have any real sexual intimacy between us. He's truly a remarkable human & I've enjoyed every day that we've been together, so I think ending the relationship over this would be one of the hardest things for me. 

I would appreciate any advice or thoughts that others may have? It's always easy to get lost in your own head & I would like some outside insights! Thank you!

Summarize the given text in a few sentences.
<bot>: I've been in a wonderful relationship with a guy for 3 years, but he is unable to have sex due to his own mental reasons & I'm not sure what do to anymore.