Hello Sunnyxin, You better don't waste your time and move on directly . You will eventually find someone to love and to be loved by , mutual attraction and liking is essential for a relation to grow. The time you would be wasting in wishful thoughts with someone who doesn't like you is better spent looking for someone else. I hope you find your match soon ;) .

drown the sorrow with alcohol

Being friend with that person is a bad idea, since feeling tend to linger when you are around him/her. Well, you can try to create something out of nothing, but that'll depend on whether or not you want to take a gamble. If he/she still doesn't feel the same way... you'll just end up more hurt. If you don't want to take that risk, just distance yourself from him/her and move on.

IF your question implies you want to resolve the issue by "getting out of....falling in love." THEN you should limit the time you spend with that person for a while, until you are able to resolve in you mind and your heart that this person do not mean to you, anything more than a friend. There are ways to hasten this process. Most of the time when we are in love, we tend to over look a person's flaws and short-comings. As horrible as it sounds, a good way to get yourself to think of the as only a friend is focus on and discover their flaws. Everyone is human, and no human is perfect. We accept our friends for the good, and the bad. Thus this exercise is not to bring you to hate this person, only to see them how they really are and accept them as a friend--nothing more. IF you want to pursue the possibility of a romantic relationship with this person THEN you must proceed carefully. We humans tends to allow ourselves to believe what makes us feel the best. Therefore, it will be easy for you believe there is more to the relationship than really exists. This is how people's hearts get broken. Unfortunately it is very hard to take a friendship to love, and there are no standard ways to do this. The basic idea is that both people must realize what a fortune they have in the other and pursue that fortune -- so do things that call attention to this. Good luck!

Firstly try to do sth and if nothing comes out it is better to leave such person.