Can you help me with this relationship issue I have?

Within these past several months, I’ve done something I regret, and I need advice, and I seek immediate help. The story is basically I cheated, I’ve done wrong and I will admit to it, since I’m not running from the wrong I’ve done. The reason for me doing what I did is because I’ve had a very…Intricate internal conflict. With being in love with 2 and wanting both…But I was with one already. I’ve made the horrible road…And I knew I shouldn’t have taken the one I made. That’s just what’s happened somewhat in a nut shell I guess. Say what you want I’m a horrible person i know, don’t remind me. But at the moment, trust. HUGE issue and I need to find a way to gain it back. Along with that forgiveness. So… The main question is…How can I achieve this? I’ve already told her I’ve done wrong, and I admit to it. And that I’m deeply sorry from the bottom of the so called heart I have. I’ve told her honest things, she’s said she forgive me but I knew she really didn’t. I understand this is a hard thing to get over…But also another thing is too forgiveness is what she needs before we can get past anything..Right? I just need help on this whole situation, and I really need someone with a good over view of what I can do..And I’d really rather talk privately about it…It’s a deed I’m not proud of…But It’s my mistake I need to fix what I’ve done. But I know I’ve definitely learned from it. Never again will it happen.