Dear OP,
you should keep this up until your girlfriend catches you or finds out without you telling her. that way you can **** up her life for a few months and make her feel like she deserves only complete twats in life. it's important that you keep this going because you'll want her to be paranoid in any relationship that she is in ever again. nevermind her, what will all her friends and family think of you when they find out it's all about impression.
you don't seem like a very confident person, this could be from being cheated on. i can understand why some people cheat, because they are not getting what they want from a relationship, but to say that you lied to just get a quick shag means that you were never honest in the first place. even if you are not interested in sex with your gf, i cannot fathom the energy it takes to lie and keep something from her. this just suggests to me that you're a fake and not very sure of who you are.
you even used another fake profile to come out to the community, what does that tell you