I Have a Confession

No matter how I feel about both of them, I owe it to my significant other to be faithful and trustworthy. It is the 2 of us in this relationship. He has done nothing on purpose and has not wanted to harm me in anyway. So I must try to make things work. We have never had this big of an issue before. We've never had problems with someone else before until now. The other person has been my weakness. It has never been easy for anyone to take hold of me so strongly. No one besides my significant other has ever succeeded in making my heart jump until now...
But I must put my emotions aside and try to mend the damage I've caused by the things I've said. If things are to go wrong between my significant other and I, I don't want it to be because of another person. I'm not saying I'm going to cut ties with the other. I just know I'm not the cheating kind.