I understand your paranoia very well. While I've never been successful in resolving it, I am certain of what I'm about to tell you.

This may make no sense whatsoever, but the best way to lose your boyfriend or to make him cheat, is to be insecure about him or suspect him of cheating or confront him about it.

The best way to keep your boyfriend, and to keep him happy, is to give him all the space he wants. Let him hang out with his buddies, including female friends. If you give him his space, he will most likely appreciate you, and also realize how much you mean to him.

They say that "distance makes the heart grow fonder." Let's think about it for a minute. Let's say you went away on a trip without your bf. Suddenly, all the things that you used to take for granted, like watching your nighttime movie with him ... gone ! You'll miss him like crazy ! Now, put him in the same situation. You give him his space ... he's out doing something without you there and without you texting him and asking when he's going to be back. He's going to start thinking about you, sooner or later ! And, he will make his way back to you ! As weird as this sounds, it's true.

You know about supply and demand in economics, right ? Gas prices - the more we want it, the higher the price to pay for it (the less available it is). Strangely, it's the same with people in relationships. The more you make yourself available, the less you will be in demand And, the more desperately you want something, the less it will present itself to you.

Seems counter-intuitive, right ? And it is ! Relationships are all about pushing and pulling. The tricky part is to know how much to pull and how much to push, and when ! Too much pulling and you're clingy and insecure. Too much pushing and you don't care enough. But, there is enough of a grey area there for you to experiment with.

I know this sounds weird and difficult, but try to start giving your bf some space. Try this in small amounts. Observe his response to it. If he really does value you, this is only going to do wonders for your relationship. If he doesn't value you, he's going to cheat on you anyway, and there's not a damn thing you can do about it. So no point being worried about it.