Is he or NOT????

I would still be suspicious and remain cautious. If you can, look at the phone logs on the phone bill to see if her number keeps coming up. Keep the topic open with your husband (talk about the woman and her seeing a man at his work...try to find out if he knows who it is). In the meantime, keep reminding your hubby that you value your relationship and you trust him. If he's guilty, your trust will get to him and he'll come clean (that worked for me). Also, keep it in his mind why he married you in the first place...keep the spark alive and make him want to come home to only you...

Listen:

Your husband is cheating on you. I don't know if he has actually done it with this woman, but he is at least cheating in him own mind.

You don't need concrete evidence to confront him.

Your instincts are correct and you need to think about getting out of this marraige cause he's a cheater and will continue to cheat.

Heck yes you should confront him. He has already given you a reason to be suspicious about him and this other woman. Make him look you in the eye and tell you the truth.

Confront him right away. If you let it simmer it will just drive you nuts. Also, give him the chance to defend himself. What if she's just trying to break up your marriage?

go to his job for a surprise lunch out. if he gives u a big huge surprise look i would say ur in truoble.