Time to move on

I forgot how hard it is to move on from one person. If its someone in my family that died or just someone that i broke up with. It's so hard not to think about them because everything reminds you of them - like songs, places or just simple words. Alot of people think that the person who broke up the relationship is the one to move faster , but that is not true. I always think about if it was the right thing to do, if that person is hurt, is he/she thinking about me or has he/she moved on already.
First im like - yeah im fine ... i'll move on and be wild and free
but then im like - i really loved this guy ... did i do the right thing?
stupid second thoughts
What do i do ?!?