What should I do stay with my husband or reconnect with my past?

Okay, I have been married to my husband for 14 years and we have been together for 16. It is my second marriage his first. We have 5 kids between us, 4 who live with us. When we married we were in love and things were good. Over time he gradually started to become just nasty and mean. I have never been faithful in any dating or marriage situation in the past, however I vowed that this time I would remain faithful and have. Since the day we met I have been only with him. Basically I have discussed his changes in behavior over and over again to no avail. He is in counseling on meds and still seems to struggle with some mental issues. He is my friend, not a bad guy, doesn’t cheat, works, and does love me very much and remains faithful.

In any case, I found the need to contact a person from my past innocently about a sick mutual friend. I really hadn’t even thought about this person in years and made the contact only because I felt that I needed to. In our communications we wound up reminiscing online for about an hour and now I can’t get him out of my mind. He said he would like to see me, he lives in another state where I am planning to visit. I am sooo torn about this situation and what makes it even worse is that almost like he knew, I know that he doesn’t, my husband finally woke up and is trying to be more attentive to me and our family and is nicer and is providing more for me than he has in a really long time. I want to see the other man who I dated on and off in my teens, but I feel that to do so is wrong, since he is also married with children. I am torn because I am afraid that this was meant to be and that my husband will revert back to where we were before. I know that I shouldn’t, but I feel like I have given everything I have to my husband and my kids and that I really need to do something for myself again. Thank you for listening. For many years now my jealous husband has cut me off from friends and such, another thing I hadn’t realized until just a few months ago when I reconnected with this guy. Either way, it has been an awaking, that is a fact! Please let me know should I meet with my old love face to face or just avoid it completely?