<human>: My (19f) boyfriend (21m) of three watches porn behind my back even though I say it's fine. He has been doing this for just about our whole relationship. I am fit and very attractive I know that for a fact. But no matter what I do he just won't stop. 

Sometimes he will stop for a few months then start up again. I don't think I can live my life this way because it's starting to take a toll on how I feel about myself and mess up the happiness in my life. He is the first man I have ever loved so it is hard to think about leaving him.

What do I do redditors, do I finally leave after all this time or do I get over it and stay with him for the sake of our family? I really need serious replies only please.

Condense the text into a few key points
<bot>: boyfriend won't stop watching porn and lieing about it for 3 years. Do I take my daughter and leave? Or do I stay with him?