Well brother, I broke up with mine a while ago and my heart still beats like crazy when I see her. But what I've discovered lately is if you run away with your problems that's dumb as fuck 'cause problems always catch up with you. So meet your issue head on, as I'm trying to do. Take some time each week (an hour is good.) and let out your emotions. The anger, regret, sadness, loneliness, pettiness, etc. And ask yourself why you're feeling it and if it's logical or even if it makes sense. You'd be surprised by the answers. This process is long, but it is a permanent and healthy solution to deal with toxic emotions that turn into undesirable bebaviors. Good luck, bruh.