Should I leave?

I've been with my boyfriend for a little over 8 months. He went through a lot of anxiety issues a few months ago, but went to therapy to resolve them. I feel terrible about this but he's moved on and I haven't, and I often have flashbacks. We've had disagreements about him making negative comments or complaining about little things since then, and he's been very understanding each time so we've never officially argued. However, when he makes these comments now I still can't help but start drama, or just hold a grudge because I love him too much to start drama. I get very angry because I'm so worried about the past coming back and don't think he fully realizes the extent of that fear even though I've explained it. I even get upset if he jokes about hating school, and he should be able to joke around without me getting upset.

Now I don't feel like we're on the same page. I've never felt such a connection, but if I'm living in the past that's my problem I can't put him through because it hurts and isn't fair to him. I fight with myself everyday about this, I feel like I'll regret leaving such a blessing of a partner...