Letting go, even if it hurts, doesn't meant you have to let go of everything. You just have to let go of the person, and your feelings for him/her, but the memories will always be there whether its good or bad. Because everytime you remember those memories, it'll always put a smile into your heart. And be glad that once in your life, this person puts on colour into your life and makes you happy, even if its just for awhile.
Thanks a lot.