Thoughts of an overthinker

I wonder why it is so hard to commit and trust someone after a heartbreak. It's been months since my breakup and I'm ready to move on but it feels wrong to like someone new. I feel like I'm not loyal if I move on, is that wrong? There are so many things going through my head. I want to focus on my studies but I also want to feel the love of a companion again. I like someone at the moment but I told them I didn't want a relationship and I am afraid that may have ruined any feelings they may have had for me ( I'm not even sure if they liked me) but even so I feel like I am self sabotaging and that I am going back to the dark space I worked so hard to get out of.