It hurts me when my boyfriend has fun without me?

The title sounds bad, I know, but hear me out. I would never tell him any of this, I know full well that this is my problem. I am paralyzed with fear that he realizes that he doesn't need me, or worse, that he's better off without me. I don't think he needs me, and I genuinly feel like a huge burden sometimes. When he tells me he loves me, I don't believe it. I believe he thinks he does, but I don't think he realizes who he loves. I'm a mess. I know, I should get professional help...
It hurts me when my boyfriend has fun without me?
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