Can someone please help?

I have been the most unlucky person in love ever! For 6 years I was apparently with the person I loved and wanted to spend the rest of my life with and now for the second valentines day I was single again! A mively depressing time of the year. Well I spent it with friends, a take away and drinking but it didn't change much! I'm not even sure why I'm writing this, maybe a sign of desperation it seems I can't get back with my ex no mattter how much I love him because he cheated on me numerous amounts of times but at the same time a year on I'm still unhappy! Can anyone help?