(Please read) How do you know he is “the one”?

I’m in a very happy and healthy relationship with my current boyfriend. We are both working on our doctoral degrees so obviously I’m old enough that sometimes I think about marriage even though we only started dating about half a year ago.

A little backstory of me: I’ve always focused really hard on academia and didn’t really focus on boys until junior year of college, that’s when I had my first boyfriend. We dated for a little over a year but we broke up because he was really controlling and emotional abusive and I found out he was cheating on me. It was the end of the world for me, my first relationship and my only at that time. I lost all my confidence then even though I got accepted into my top grad school with a full ride, because he was jealous and he would say things like you’re fat or ugly to make me feel bad about other things in my life.

Fast forward to grad school, I moved to a new city, the breakup really (almost) destroy me, I got depression, lost motivation on everything. My everyday life was going to school, then going home and sleep for 12+ hours. No sleep seemed enough for me.

After Christmas, I started trying my best to get my life back one step at a time, I rested a lot, read a lot, and made friends, that’s when I met my current boyfriend. He is a true gentleman who respects me and my body. He’s not really good at showing his love verbally, but his actions show it all. I am very very in love with him, and I really truly hope that he’s the one.

However, I find myself questioning and doubting our relationship very often, even though we had never fought and he’s never done anything wrong (other than forgetting to text me sometimes 😅). I think the reason I’m like this is because the previous relationship and breakup were pretty traumatic for me, and I really don’t want that to happen again. I’m scared to open up to him and sometimes the tiniest little issue that’s nothing could trigger me. I often worry that one day he is going to dump me like my ex did.

So back to my question, is it normal for me to feel this way? Is there a way to make myself more comfortable in the relationship? And how do you know he’s “the one”?