I can only speak from my own experience. My husband and I had mismatched sex drives. I was an every day gal (more if there was time), he was a once every week or two guy. I struggled. I felt rejected, ugly, unloved, unwanted and lost confidence. We tried talking but he wasn't up for a compromise. I never cheated but I can see how you could think that way. My advice is to deal with the bigger issues. Firstly, is there a medical reason for his low libido e.g. hormones or stress etc. Secondly, is there an emotional reason? Then see if there's a compromise to be made. You can take care of your own needs if it's purely sexual and he doesn't have to have sex to be actively involved in making sure you get off. To me, cheating would cause nothing but misery. No penis is worth the cost of an otherwise happy marriage x