How can i forget about my ex boyfriend?

well my ex broke up wit me because i didnt come n see him for quite a long time cause i had alot of problems wit da fam..buh anyways afta we broke i end up callin him everyday becos i still got feelings for him....n i miss hes talks......but the thing is e keeps tellin me al the time dat e loves me and dat i was the reason y we broke up....the otha problem is dat i know dat hes got a notha gyal....buh i jus want to get ova him.....buh i can neva get bck wit him eva....i jus need advice to get ova him....its been 4 months since we've broke up