Do I pursue an old love or stay with my husband?

Ok, here’s the back story. It’s kind of long so bear with me. I had my first little “boyfriend” back when I was 13 and we dated for 6 months, going to the movies, little notes in the locker, dances and such. I cared for him like a close friend because I still didn’t understand my body and attraction. Well, I ended up breaking up with him, just for the fact that I was going into highschool and didn’t want a junior high boyfriend (he was a year younger). Stupid, yes, but I was 13. A year later my family moved away, but we managed to keep in touch and talk ever so often. A few years later our conversations became few and far between. It was my fault, I became too busy with my social life. We actually went to the same prom, but with different people at a unrelated school. A year went by and we hadn’t talked at all. Then one day I walked into fast food resterant and there he was serving my lunch. He sat down and we talked a good while, and he ended up confessing to me that he had been in love with me for years, but during the time we hadn’t communicated he had gotten engaged to someone else. I realized too that I had deep love for him, but not wanting to interfer with his engagement, I wished him well and gave him a hug. I grieved nightly thinking about my loss and always comparing my failed relationships with him. Fast forward nine years, my daughter was starting Kindergarten and, surprised as I was, he showed up in the same class with his son. We talked excitedly for what seemed like hours. He confessed that he had been married for a while with two children and I myself is married with three. We see each other everyday when we pick up our children and have an engaging conversation. I miss him terribly. I haven’t told him my feelings so I can avoid awkwardness and knowing that if we became involved it would affect both of our children. But, I know he feels the same way because of his actions. Following me around and the close hugs. I care for my husband, but he is an alcoholic and can be a jerk at times. So do you think I should tell him my feelings or keep it to myself? Any advice would be helpful. Thank you.