Caught in a love triangle help?

My husband and I have been married for 3 years but we got seperated in December and thought we were completely over. During that time I began seeing someone else, and I know it was wrong even though I hadnt even begun starting a divorce, but I was lonely and I am pretty sure my husband was seeing someone else also. Anyway the guy I was seeing was amazing and he was actually going through the same situation as I, and that and other things made us bond very well. Although it has only beeen 2 months he has been overall amazing. He's helped me around my home with fixing things, wines and dines me, you name it he has done it. He is going through a tough situation right now as well with his wife, but they are really getting a divorce only because she does not want him because he is not trustworthy and I know if she would give him a second chance he would drop me instantly and go be with his wife again which is fine. But my husband and i have begun rekindling our relationship and we have decided not divorce after all. Only thing is I honestly believe this guy has fallen in love with me and i do not know how to break it to him that my husband and I are getting back together. Please give me advice. THANKS!