I agree....its very important to have trust in a realtionship. Eventhough everyone worries about what their gf/bf is up to, u can still have enough trust to atleast trust them and just maybe not other ppl. if u guys have been together for 3 years then there must be some trust in the relationship, and if u have trust in the relationship then u should be able to stick it out and make sure that breaking up is really what u want to do. and if she has problems with ppl not trusting her and she has still stayed with u for 3 years, she's gotta really care about u, and that takes a lot, trust me i know!! So id say really give it some thought before u make any drastic decisions.