Hello and welcome to MB, Befaithfull.
Listen to what the others here are telling you, they couldn't be more correct. Chances are your W really is having an A; although it "may" not be physical, this does not mean it is not an A. EA's (emotional affairs) can be just as damaging as physical affairs can be (sometimes even moreso) and, often, EA's turn into PA's sooner or later, anyway. Now is the time to "nip it in the bud."
If you haven't started snooping yet, I would suggest you do so asap. Of course, you need to be sneaky and do your snooping unbeknowst to your W, so snoop carefully and use caution. If you can, check her cell phone records for "unusual" calls/texts, if she uses a computer try and find out what she does on it and who she talks to, etc. For more snooping tips, check out the "Spying 101" link that Niitse left you in one of the posts above. Whatever you do, "DON'T" let your W know what you are up to and "DON'T" feel guilty for doing so...you are trying to save your marriage (and that is a good thing, so nothing to feel guilty about).
In addition, do not let your W know about this place (for now, that is the last thing you want to do). Read everything you can here (spying 101 thread, exposure thread, surviving an affair thread as well as the Basic Concepts, Questionnaires, etc offered), there is loads of great advice to be found through these.
I am so sorry you have to find yourself here but, take note, your marriage CAN be saved and it can be a fabulous one if you are willing to take the time/energy/hardship that comes with trying to save it by using the advice you find here. Granted, it won't be easy (it never is) but it CAN be done so do your best to stick with the advice you are given here at MB...regardless of how difficult you may find it right now (it usually gets better/easier once you "learn the ropes").
My wife told me two weeks ago that she has never loved me.
You are not alone on this one, many of us here have heard the same thing ourselves and, usually, those words mean squat and are just used as a form of "self-rationalization" (this is often what waywards do to try and convince "themselves" that they have a good reason for doing what they are doing, making them think that their "wrong-doings" are, somehow justifiable). Don't feed into the "I've never loved you, I don't love you, I'm not in love with you anymore" (etc) lines; almost all waywards say that along with any other "excuses" they can find to make them feel better about themselves and to "lessen" (in their own minds) the wrong of what they are doing. If you really think about it, your W is just trying to come up with answers as to "why" she is doing what she is doing simply because she is "grasping at straws" trying to find an answer that she feels can be used as a "reason" for doing the wrong thing. This is all VERY typical action on the part of waywards, don't allow it to consume you.
Anyway, as sorry as I am that you feel the need to be here, I am still glad to have you here all the same and I sincerely hope you'll find the help you need. If you stick around and take advantage of the advice you're given...I honestly do believe you will!
Good luck to you.