Dangerous territory - tread carefully. You have more to lose than him. Is it worth throwing your marriage away on a whim?
You say your hubby is a pretty great guy, my milkman is a pretty great guy, so is my postman, what I mean to say it that you don't sound too enthusiastic about him. I think you should work on fixing your marriage - he is the only guy you have been with so I can imagine that you must wonder what it would be like with somebody else, and since you have been together for so long your relationship possibly lacks the excitement and fun that new guy can provide. You need to concentrate on how you can make your marriage more exhilarating and fresh, how you can recreate the sparks.
When you have been married for a lengthy period, passion and romance are put aside on the back burner whilst other aspects take priority, and then you find yourself stuck in an extremely mundane routine. You and your hubby should try courting again - lunch dates, dinner, dancing, it's best if you meet each other at the location, arrive separately rather than together so that it feels more new. And you should make a pact not to talk about 'boring' things like bills and finance and what not, treat it exactly like a date! I know it takes a lot of time and patience, clearing up your schedules if they are tight but persevere. It seems like you may just be attracted to new guy on the scene because he offers what is lacking from your current relationship be this attention or affection or even both. Rather than believing it's a sign that you should be with him, think of it as a sign that hints at what is lacking in your marriage so that you can ultimately 'fix' it.
[SIGPIC][/SIGPIC]
Love is like a merry-go-round: you get all dizzy, and then you feel sick!