There's nothing wrong with venting or wanting to get this off your chest, it's normal for a man as young as you are To go through these things as we all did at some point. Thinking about someone is one thing, allowing it to consume you is another. Learn to love you, put you first and never put more energy into someone else than you put in yourself. If it's eating at you that bad, then get in contact with her and if she turns you down, then that'll be all the closure you need to move on, but don't waste your young, prime of your life years with a "what if"? Call her and get it off your chest if your really into her that much..............Or you can do like I would and get over pussy with more pussy