<human>: Could you distill the essence of the text into 1-3 sentences?

Ok, I've known my boyfriend for about 8 years. We've been going out for 5 of those years. Everything seemed to have been going great. Until he met my best friend, Dominic. Dominic is my ex-boyfriend, who has proposed to me. But to me, he's a brother, a childhood friend. My boyfriend cant seem to accept that. He's always trying to set me up with  Dom! Whenever he gets mad at me he always says "just go back to Dom." Is this jealousy or what? Why is he acting like a three year old. People can be just friends, so whats his problem? He wont talk to me about it.
<bot>: Boyfriend keeps telling me to go to my ex. I repeatedly tell him no, that he's (boyfriend) the only one for me. He's being a jerk. What should I do?