I get over things fairly quickly, but I also tend to end things when red flags start to pop up. For example, with my last ex, he tried to pressure me into letting his friends do whatever they want to me while we were on a date. The next week when we hung out, I confronted him on it and laid out how his behaviour was coercive especially in the context of us trying to work on a relationship (not to mention he was 38 and I was 25 at the time). When more red flags popped up (late for dates, needing me to pay despite him having $100K a year job and me working minimum wage at the time, the drinking problem), I broke it off. I would later find out that his drinking problem escalated and he lost his job and ended up locking a guy in a closet covered in lube to prevent him from leaving his cabin on the lake.

The way that I get over things is to be analytical about them. Look at everything objectively and use that information to help guide you on what it is you are comfortable with and what it is you are uncomfortable with. Pushing through and confronting things can be scary, but if you don't try then it will take longer to hone the skill and the further away you'll be from a fulfilling relationship.

Also, make sure you are in a place where the relationship doesn't become all consuming. Make sure you are maintaining your hobbies and interests and make sure you are making financially stable choices so the relationship doesn't become a necessity for your survival or your personhood.