Well I'm the same way with my boyfriend I'm 22, and I won't even let him look at girls on the TV lol. I know its crazy and ridiculous also, but I can't seem to stop myself. Everyone says its cause I'm insecure and that maybe true, but I would like to hear another reason if anyone can help please do thanks.

Hi

You are insecure.

No other reason.

As for looking at girls on t.V what you mean like girls in movies? Or porno?
Because I know a lot of people with that problem.

But its OK you are young and they are things you just need to work on together as a couple
I would talk with your boy and tell him how you feel.

I would also give him some freedom as well because you know the more you hold on... the more you push away.

And your insecurity is turning you into someone who has to control a situation.

Do you try to tell him what to do in other ways too, as to his clothing or his eating or his smoking or when to go to bed? Do you like life to be lived in a certain way in that you have routines for things and don't like to be pushed off track?

You are afraid,

Of MANY things.
Of losing him.
Of not measuring up to others
Of not being good enough,

I could go on, because it doesn't matter what you are afraid of, all that matters is what you do about it, and the impulsive out of control behavior that it brings, and I think first you eliminate the obvious, with a physical/check up, and some honest conversation with your doctor/OB GYN, and then let them guide you to some solutions, or the proper help.

In this way at least you are showing you are willing to resolve this the proper way, and that's a start, to getting yourself under control, and get to the root causes of your fear, and way out there, unreasonable, unacceptable behavior.