Bullied in the past, not sure how to let it go?

It is difficult to overcome the harsh experiences some of us had growing up. But I have found that dwelling on it isn't healthy, and yeah you can sometimes lash out at others if you feel "threatened" like you were growing up. But really few bullies of that nature in our adult phase, so easier to deal with. If it really bothers you a therapist might be the answer. Or you can try walking or running to get your mind of the issue, as it will increase your hormonal releases and make you feel better naturally- put you in a better mood. Difficult experiences in the past haunt us occasionally, and that is just a fact. the key is to realize they are in the past, can't be changed, but are of no relevance today or tomorrow. Good luck.