Good advice dolly. Engage brain. From a blokes point of view, you cannot undo what is done. You are not getting what you need from your BF. I can see only one option. You must get out of both relationships. When it comes out into the open, and it will, I assure you, a family will be destroyed. BF's mother is not going to thank you, or her husband, is she! BF is not going to thank you, or his father is he! His father will blame you. No option really, is there.
You will find the attention and romance you need, but not in this situation. All I can see is heartache and pain all round, and very soon too.