Need help...before its to late

Ok i'm having a little bit of trouble in my current relationship now. they are mostly trust issues that i would like to have solved because thats whats needed for any good relationship..anyway the reason i am having trouble trusting her is because after us dating for a lil around a year...i caught her cheating on me....of course we broke up and all the other fights and stuff that went along with that well....i took her back after a lil bit...and we have been together for about a year now since then..actually more like a year and a half...if you exclude the fact we just resently got back together...cause we broke up for a couple months thanks to me this time...i kept pushing her away then i think she finally started to drift away..well she started hanging out with these older guys...and i started to realize that i didnt like it and i wanted her to go back to giving me all of her attention...but it was a little late so she kept saying they where just friends and if i wanted to spend time with my friends and not with her she should be able to be with hers...(which i wouldl have no prob with if they where not like 30ish(shes 20) and guys one of which i know was hitting on her before) anyway....i started trying again and she started resisting this time instead of it being the other way around( you see after i caught her cheating she really did change but i was mean thinking it was her turn to carry the relationship as i had while she was cheating so that lead to our end) but up until the end when she started hanging out with these guys i had no trust issues...but after a month or so of being broken up...we are back together now..and she dosnt hang out with these guys..but she does still talk to them sometimes...(being that they hang out where she works...not just because of her but she works at a "hang" out spot) adnt hey sometimes talk on the phone because they are friends...Not to mention the other ppl i know shes flirted with before...but i wont go into that since this is already like a short novel...but now i have trust issues with her with everything she says...everyword she speaks i doubt and when i tell myself i should'nt i think back to when i said that before but she was cheating and now i am scared to ignore it but if i don't stop these thought we won't last cause i can't take it anymore...and i know she loves me but i don't know what to do....also why would my trust issues just come up now..and not for the almost full year before she was talking to those guys...i mean she wasnt really talking to them before but the one was hitting on her...then she started hangin with them...i just wish the pain would end...can't live without her...but slowly dieing with her...what should i do!?!?!?!


P.S. sorry for the long message i tend to drag stuff out..ask any questions if needed for a good resp..cause i tend to type and type and only say a little bit :P Tweet