Do you still have pictures of you two in your room, or posted on your Facebook profile? Delete them immediately, not just because you seem pathetic to others by still clinging on to something that is long gone, but also because they remind you of him. That way you will never forget him, and will never be able to move on. So, get rid of the pictures now! Save them in some drawer you rarely open and in some years when you will find them again and they will be a nice memory.