First, this is totally normal, this is how we are wired, you body thinks you found a mate a starts bonding process for you to raise a child together.
* Go meet several girls at a time, your attachment is going to be diluted among all of them, you wont behave or feel needy and you will realize this is how your body works, just like night comes after day, and you need to adapt and deal with these circumstances.
* Your future projections is your thoughts and 100% controllable, you are in charge of what you think. Learn how to switch your thoughts to a different topic. Meditation helps, being present helps.
* Enjoy this feeling. This is what I do. Sex is great but love provides much stronger and greater cocktails of neurotransmitters and hormones that make us feel high. It is like a car, learn how to drive and enjoy the ride! And remember, you will need to refill the tank at some point!