My ex broke up with me about 4 months ago, a day after we celebrated our second year anniversary. She said she wanted some time alone to be by herself again because there's things in life she still wants to explore. I know she felt suffocated by the relationship and so I agreed. Now I still think about her all the time and I can't help but feel jealous when she's out with someone new doing things with other people instead of with me. Should I just move the fuck on? I tried to think negatively of her so I'd learn to not loce her but she's my best friend, how Could I?