I'm a very extra jealous person I can't stand girls in bikinis or half naked. I can't watch a movie or TV because I think that my boyfriend wants them or imagines them naked. We can't even go to water parks because I think that he wants those girls. I don't understand why I'm this way if he never cheated on me and I never ever catch him actually looking at girls or anything.

You really need to work on this. If you don't, you're likely to drive him away. I'd look into therapy. Get to the bottom of your issues and work them out.

Are you serious? Guys are always going to look at girls, and there are heaps of half naked girls paraded in the media the so you'd better get over it quickly.

If you want your relationships to last, I'd get some professional counselling now. There is nothing that will kill a relationship quicker that the green eyed monster.

This is your issue, so take responsibility for it, and do something about it.

You'll be much happier in the future if you do.

You need to go and seek professional help and quick, this is out of control. This is your problem and you can't face it alone, believe me I tried(wasn't quite as bad as you) and I failed, until I got help

That sounds more like a phobia instead of jealousy.

Being this anxious, your best shot is to see a psychologist.

I think insecurity is at the root of this problem.

It seems like you have a problem with trusting your partner - not believing that you're "good enough" to keep him faithful. The thing is, you CAN'T keep him faithful. You have to trust him to BE faithful.

Relationships are built upon trust. Without trust, there is no solidity to your relationship. If you do not trust him and believe that he will be faithful to you, no matter who or what he sees, then you have a problem with insecurity.

This is something that you're going to have to conquer. It probably spills over into a lot of areas in your life.

Work on your trust - if you can't trust him, you shouldn't be with him.