Ex's are a pain in the arse

I'm 15 I went with a guy 2 years ago I really liked so much and when he dumped me I was a mess but now he is a total asshole he is so mean but my friend was telling me all the sweet things he said when he dumped me he said he dumped be cause he wasn't good for me but I hate that he is the guy that gets to me every time when <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> I see him my stomach drops even tho he's a prick I still like him even though I don't want to any tips to get over this I really need it .