Hello

I've been working on my resume and have to get it done for today, seeing as a position I'm applying for, closes tomorrow. The thing is, as I'm writing my resume, I feel like an imposter. I don't know if this is just the anxiety speaking. I have a tought time having faith in myself. I've just graduated from University. I'm in need of a good full time job, so I'm applying for a position at one of the universities here. I'm feeling a bit underqualified for the job, my boyfriend who already works there, reassures me that I'm not. But I can't help but feel like I'm not all that smart or intelligent enough to work there. I did well in University, not great, but decent grades so I feel as if there's no reason to feel this way. I tend to obsess over the way I write and compare myself to others, thinking they write better than I do. It never feels good enough.
Sometimes I'm worried it's not self esteem based but that I'm actually not that smart. I REALLY struggled throughout elementary school. I remember being pulled out of class to read with the resource teacher and it made me feel so stupid, especially around all the other kids. Despite earning good grades in high school and doing well in University, I can't seem to shake the sense of not being very smart.
I also have a father who has some self esteem issues. Despite being very loving, he's always made me feel as if I wasn't that bright. I once told him I wanted to go into interior design and he said "do you think you can handle that?" It made me feel like my own dad doesn't even think I'm very smart. Whenever I get good grades at school, he seems kind happy but kind of surprised. Even though I know I'm capable.
Sorry, for venting so much. Once I start, I just can't stop!

Any advice as to how I can start believing in myself??
Thanks,
Jo