You sound like you are very young and if you have never been in love like that before, you should enjoy the time you had and will have again and stay busy doin' things of value for your own self esteem, strength and heart. If it's meant to be - have faith that it will be. Don't waste time worrying because life is so short. If you appear too needy and clingy he'll run the other way because all men hate that.
Unless he's really needy too
Be strong and feel free, sister girlfriend.
Peace & Love.