<human>: Can you provide a brief overview of the text?

I really love my bf, and I'm sure he loves me too!
Everything is great, except the sex. Meaning we have none. 
He is really into diaper play and stuff (he wants me to wear them).
He told me 2 months in. I thought I would be okay to wear a diaper every once in a while to turn him on. But I did not know, that this is the only thing that turns him on. he wants this to be a really regular thing, and I'm not comfortable with that at all. I told him that I'm not into it, that I can play along every once in a while but that this is not my fetish.

This resulted in us having no sex at all. This situation is not okay for me at all. I really like sex and I need it. But being with him is more important to me than having a great sex life.

He wants to stay in the relationship too. He wants to have a future with me. BUT he wants an open relationship. He wants to fuck other girls wearing diapers.
He does not understand that I am not okay with an open relationship.
He says it is just sex and has nothing to do with love. And keeps on asking why I don't want him to have a fulfilling sex life.
I want him to have a great sex life, but I don't want him to have sex with other partners.
Am I being selfish? And is there any other solution out there besides an open relationship or breaking up?
<bot>: bf and I are not compatible sexually. Bf wants an open relationship. I don't want one. Am I being selfish? And is there any other solution out there besides an open relationship or breaking up?