What’s wrong with me?

So I have a history of anxiety and depression and personality problems.

Well I have a boyfriend of almost 10 months and he doesn’t understand how my brain works or why I feel emotions so much stronger than most people. He doesn’t understand why I cry over the smallest of things because to him I’m “getting upset over nothing” well we haven’t seen each other in a few days and I feel so uptight, abandoned, lost and hurt all in one and he doesn’t understand it at all. All he tells me is “you’re okay” “you’ll be fine” “you’ll see me soon so stop” and it just eats at me so much because he says I’m overdramatizing things and I don’t know how to get him to understand anything of how I react to things and to why everything hurts me so much more and I feel everything so strongly. Like I’m a mess. I’m so close to crying right now. And I don’t know what’s wrong with me or how to get it through to him because every time I tell him there is something wrong with me he says “no there’s not it’s in your head”