Lust will always leave you unhappy because it is a thirst that can never be quenched.
You can never get enough. The more you act on your desires, the more they will become inflamed.
The only solution is to fight with all your might, using the help of the Virgin Mary. Imagine her blue robes and peaceful, meek aura. Imagine the shame you would feel at doing anything impure in her sight.
Not only should you stop watching TV, you should stop looking around you as you walk back and forth to and from class. Colleges are a hotbed of hormones.
One method I can recommend is to style your hair or your clothes in a way that makes you feel ugly. I find that when I feel unattractive, that I'm less apt to be attracted to others. I don't know about you, but I used to be very vain and what really attracted me were women who would play into my vanity. So many modern relationships are based on mutual ego satisfaction.
So now when I do my hair I arrange it in an unflattering way and dress like a slob in clothes that I've worn for a week or more. Try it, it works. Overcoming your vanity is surprisingly effective at also overcoming lust.
If you go outside and feel gross and unkempt, and think everyone is staring at you because you are so ugly, the last thing on your mind will be romance. But if you are strutting about campus in provocative outfits, you will not only inflame others but yourself in the bargain. You will excite yourself about yourself and you will need a man, or boy, to be your mirror and admire you.
I hope that makes sense. I think you might have that kind of mindset since you seem to be afraid of "wasting your youth." That must really be a temptation for women who want to be worshipped while they still have their looks and figure. But those are going to fade. Today is always a good day to become Mary Magdalene and repent for the rest of your life.