Read my last question to answer this one...How do I not *** up a great thing by thinking my bf?

Get your into therapy to deal with your past relationship issues before you screw this up! Just because you were cheated on in the past doesn't mean you are going to be cheated on by every guy that comes along. There are great men out there who are ready & willing to give their big hearts to the right woman...you might possibly have found one...so find a therapist and work on it!