What does it mean when he accuses you of being unfaithful all the time?

Answer 1

Okay, here is a possibility.  Maybe you are not being unfaithful technically. However, maybe you are actually being totally remote and unavailable emotionally.  

Maybe you are a mismatch.  You see that this person needs reassurance yet you do not want to give it to them.  Maybe you are not clear and connected with them when you tell them that in fact you are not unfaithful.  In fact, you might hesitate when talking about this subject because you in fact have the upper hand if they are jealous and you are not.

It would be possible for you to offer your help in trying to get them to see what their jealousy is in the first place.  If you love someone, anything is possible.  If in fact you don't love them, then perhaps you are not being unfaithful, but you do indeed want to break it off and they sense it.  

If this is the case, then by all means, break it off and let them know that it was all about you all along.  This is the humane thing to do.  They want to be free too, you know.

Answer 2

I'm going through the same thing, the problem is getting worse as the Years roll on.  I now feel like a Prisoner and fear going out or talking to anyone because I know the accusations will start.  Ive been accused of having affairs at every company I have worked at, affairs with my own family members...every male member!, accusations that I have affairs with my sons school friends when they were younger!!!
I have tried everything to demonstrate to this man that I am innocent to the extent that I no longer leave the house unless to do grocery shopping and go to work but nothing has worked, as much as I love him this has made me so miserable and empty inside and its time for me to break free...yours may be different but I doubt it will be.