my ex gf & i have been broken up for a year, she has a bf now.she hit me up last month and we've talked and met up. we haven't talked in about a month but i've been missing her what should i do?

You should tell her. Although she now has a boyfriend, there is a reason that she contacted you in the first place. Theres a very good chance that she misses you just as much, maybe even more. I know it may be an intimidating situation for you, given the circumstances. You may be wondering "what if she doesn't feel the same way and I look dumb?" or "what if I'm overstepping my boundaries?" But, I can promise you that getting it off your chest and telling her is much better than wondering "what if". She may miss you but be scared to tell you, or she's waiting on you to say it. Say it. Take charge! If you had something once, theres a chance you could have it again. Life's too short not to wear your heart on your sleeve. Best wishes to you!