emotions after a break up

Amanda • You can live with a lot of people but there is only one you can't live without☻
I really never let guys in because I find it really hard to let people get close to me and I finally opened up to my (now ex) Boyfriend. We dated for almost a year and we broke up... it kills me nearly every day and I'm not sure how to move on? Sometimes i feel like I have moved on but then he pops back up and it's like he never left. Any advice?