I posted something similar a while ago but I guess I'm still struggling with the same issue...

My partner (25M) is some years younger than me, intelligent, knows how to fix and build stuff, knows a lot of cool cultural sh*t, and is an all around good person, and I don't feel like I'm good enough for them – I feel like I still make too many silly mistakes to be considered a proper adult and I'm just not as intellectual. I know a bit of stuff here and there, and I'm more of a creative person (mildly chaotic)... I feel like I just stumbled through life and got lucky with the opportunities I did get. I don't see how that is worth anyone's attention, time, and affection.

It's a problem because, it gets to the point where I just get angry and annoyed at them for caring about me (not openly, I have some restraint lol), and I just want to push them away. Which makes me very confused. Because on other days, I care about them a lot, we have fun and are very close.

I've been in enough relationships now to know that hiding things from your partner isn't good, and I try to be as communicative as I can when I feel bad, but I feel like if I honestly say what I feel in this case ("I'm too dumb and not good enough for you") that can't end well? And may come across as accusative. Plus I'm just embarrassed that I feel these things. Help? :'(