My girlfriend thinks she doesn’t have my full attention no matter what I do, because when we began talking months ago I liked pictures on Instagram while we were talking, not even dating. She assumes that I have eyes for everyone ever since that incident, no matter how much I reassure her, she won’t take me for my word.

She likes to bring up hypothetical situations and when I give my answer, it isn’t good enough or she twists it to fit her argument. She has a lot of self doubt and she blames me for it, we have come back to this same argument time and time again and this is literally our only problem in the relationship. She has threatened to leave me plenty of times but never has and she says my words don’t do anything, but it seems my actions don’t either.

I am really stuck in this situation and how to fix the problem at hand so we can get past it, but it is a one-sided affair on my part. She is very closed-minded, but I feel like this is the only thing hindering us. Please help.