good advice ?

please no commenting that I sound like a child or I'm controlling. I told my Bf to spend less time with his girl friend because it upsets me and I feel like she's more important to him but he won't so we've been fighting I feel worthless. he always messages her to see if she's going to the soccer games but I'm never invited and he paid for her hotel and flights to go to a game, it was only 50 for the flight apparently and she paid him back. but its the fact he desperately wanted her to go he paid for her but never invited me. I think he loves her and doesn't want to admit it. I need helpful advice he just keeps saying its all in my head but it's not