So, I am single(again), sometimes it's lonely, other times, I love it. I was raised to believe no sex before marriage. I mean it was drilled into my head, along with drinking and smoking(I've never been tempted with those though

.)
This guy who has been an off/on thing for awhile. He as 2 kids, but doesn't want to commit to anyone. But he offers so much temptation and isn't afraid to say it. Sometimes, he will text me these dirty messages and I have to just blush and ignore them. But oh my heavens, its getting hard.
Has anyone been in those situations, where you really want to give in, but you don't. How on earth do you get through them? I have to turn my phone off and pull out my scriptures sometimes. How do I just tell him to back off without ruining a friendship(during the off times)?
I think he doesn't want to commit because he has two kids he's been through the whole marriage thing now he just want "free milk" without all the strings attached.
Any advice would be much appreciated.