Hi. I hope that I can help you. It sounds like you really want this current relationship to work for the both of you. I think you show insight when you wrote that you allow yourself to get to attached to other women. Love happens in the head and builds to the heart. How much time do you spend thinking about your current love? I believe most actions follow thoughts. When we make someone the object of our affection we usually have behavior that follows. What behaviors can you think of that would show your love that they are truly that? Relationships are built one thought, one action at a time. Decide to start right know and building a lasting relationship with loving thoughts and loving deeds. It takes a lifetime to build a lifelong relationship. Any thoughts on your end?
How long have you been together and when was the last time you cheated on her? Do you think you both have resolved the past infidelity?
I think because you are having problems cmmunicating your feelings, couples therapy would give you a safe place to talk about what is happening in your internal world and give her a place to process her feelings too. Forgiveness is allows the beginning of healing