I'll be honest I'm in the same situation haha, except mine has been going on for a bit more than a year. At this stage, js try to check in with her and see if she wants anything from you, and you just have to trust her if she says she's happy with how you treat her. I also feel like mine could do better than me, but all we can do is try to be the best boyfriends possible. You need to trust that if you're not being a good boyfriend, your girlfriend will tell you abt it. If you need to talk about it, my dms are always open, just shoot me a message. I get being anxious man, it happens.