I too am a bit confused.

What does your relationship with your current GF have that you don't wish to partake in? I understand that you don't have a desire to participate in any of the activities that are triggers from an abusive past, and you can tell your gf that you do not wish to take part in those activities as they do not make you feel pleasure (You don't even have to say why.. just that they aren't your thing and you don't want to do them).

The only things that I know from your relationship with your current gf are that you've messaged other women because you didn't feel satisfied, and that you've lied to her.

Which are your actions, and not hers. The only advice I can give you is to NOT lie to your partner or cheat on her.. and to be open with your communication of wants and desires. Note that I did not say that you have to be open with your past. But you do have to communicate openly - if you don't like an activity, or if you feel like you have a higher sex drive, tell her and discuss it.