Luvs
Hang in there. You are not alone. You should not feel guilty over the actions that you have taken. It sounds more like you are afraid to find out for sure (and who wouldn't be?). But deep down, you already know, right?
I implore you to find a good individual/marriage counselor. Most insurance plans will cover it (individual counseling -- couples counseling is usually not covered, but easily can be if you know how to approach it ((EM me for details))). Start out individually and let it progress to couples (if he will even take part). This type of thing lives with you and eats at you each moment of the day. I know. It can really put a downer on your outlook and be a severe confidence-killer to boot. If you ask around, you can probably find a good counselor, if not that way, start with the phone book and ask questions. I have been through this process first-hand and cannot express how much it helped me on an individual level.
Knowing or not knowing for sure is really secondary at this point. It sounds like there are other issues. Having somebody that is professionally trained and unbiased can make a world of difference. You have to take the first step though. Remember, there are no dress rehearsals in life, this is it. Do this for yourself, and for your relationship.
There is a great discussion board over at
www.marriagebuilders.com -- lots of good folks over there. Might be a good place to lurk and/or vent. Some good books to read include: LOVE MUST BE TOUGH by James Dobson, RELATIONSHIP RESCUE by Phil McGraw, HIS NEEDS/HER NEEDS by William Harley, GIVE AND TAKE and SURVIVING AN AFFAIR (also by Harley) are also excellent reads. (SUA is an excellent read whether or not there has been an affair)
You are a good person. You deserve to be respected and loved. There are people out there for you if things can't be worked out. You do not have to be alone, and nor are you. Many, many people are in your situation. This may be just the thing to get you back on path with your H. To shake things up a little bit.
Stay tough and listen to your instincts.
Again, EM me if you want to talk or vent.
*hug*
MACHINE