Most Helpful Guy
By doing whatever it takes to forget him; you can hang out with your friends more often, join a gym or try out new activities. In time, you will forget about him
Most Helpful Girl
It could be a sure sign that Mother Nature is telling you to Break the ice and... Talk or something.
If you feel it would be fruitless, hopeless, then focus real hard on other things, other friends, and begin your beguine without him.
Out of sight, out of mind eventually will heal all Wounds... You need to tell yourself that if it didn't work before, time to close the door.
Good luck. xx