I need help...I am a married woman writing to her first love in jail...?

I don't know what to do... I wrote to my ex of 10 years, in jail. I told him I forgave him for all the mental, physical, and emotional pain he caused me when we lived together (when we were 15). I didn't write a return address and I requested that he not write back, but he found me and wrote back. He said he thought he would never hear from me again, but that's he is grateful that I have given him another opportunity to apologize to me. He said that he acknowledges all of his wrongdoings, and says that he wishes he didn't have to hurt the people he's hurt with his mistakes, but that going to those life experiences have helped him mature. He says that he respects my husband for knowing how valueable I am and how much my love signifies... I don't know what to do though...my husband has noticed my change in moods, and although we love each other very much, there just are somethings that are not working out...like our love life. I think that may be why I am reaching out to my ex...