So I really like this guy and he says he likes me but he flirts with this other girl. But I just can't get over him what do I do?

Form example he flirts with me but when this other girl comes around I'm like the last thing on his mind

How long have you liked him? He may say he likes you but maybe he likes a lot of girls. You just have to accept that. When you do, you'll get over it.

Since last year. But there is something inside me saying don't let him go

You need to wise up. If after a year of liking him and he is still flirting with another girl you need to get a clue. He is not that in to you. There is nothing to let go of.