So I am currently going through a break up with someone I was dating for 8 years. He broke up with me and I  am finding it really hard to cope. We are trying to remain friends but I keep doing things that are slowly burning that bridge. I want to get back with him, but not sure if that is due to me being terrified of abandonment or not. He told me the other day that he wasnt sure how much of my feelings are love and how much is just possessiveness. I want to talk to him constantly, and get extremely jealous when he so much as looks at another girl because I feel like he is already replacing me. He has reassured me so many times that this is not the case and he just needs some space to think. I have told  him I will leave him alone, but I get this urge to talk to him that just doesnt go away and I eventually give in. He keeps telling me he wants us to be more emotionally independent, which is fair and makes sense - I just don't know how to do this. 
Looking for any advice on how to cope with a break up to not make things  worse between us.