I don't think you are over reacting at all. And, this is coming from a man that has had his own issues with sexuality. Lets just say that I have dabbled in some sexual "escapes" that cost me a relationship.

Both men and women (but admittedly more men) can view sex as a utility and not place sufficient emphasis on the emotional connection. At first, this may seem perfectly normal to the person that is engaging in these types of activities. But the reality is that as time goes on partaking in these activities takes time and energy away from the relationship. And, the individual partaking in these activities may find it difficult to get excited when they are with their partner, because they need the "rush" they get from engaging in these things.

So, I don't think you are over reacting. Should you throw in the towel? Probably. With one caveat. IF, and I mean IF he admits that there is a problem. And, IF he agrees to stop and recommitt and reinvest in the relationship then it may be salvagable. He should do some research to find out the devastating consequences that can occur to men that take this to the extreme. These people wind up lonely, isolated, depressed and often times suicidal. They realize, many times too late, that they made a mistake. They realize that what they really wanted and needed was a close, intimate, loving relationship.

Get him to do a little research. Have him read my post if you like. Have him e-mail me. I am willing to do that because it may be too late for me, but if I can help another man from going down the same path that I did that would be a wonderful thing.

There much have been something about him that brought the two of you together. Your decision really boils down to if you want to take the risk of being by his side to help him. But, if you did do that at least you would know for sure if he could change. I think a lot of times it is good men (like me... I'd like to think I am a good person that has made mistakes) that go down ths path. Frankly, I wish that my partner would have stood by me as I worked through this. But, I understand completely why she did not. I know in our case we were a great couple had it not been for my depression (probably caused in large part due to my actions). Ask yourself if there is a strong enough foundation there if you take away his acting out. If there is it may be worth the risk.

I wish you the best.

Good luck.