i guess when forgetting the past memories are near impossible, what you can do is fill them up with current happier events..so much so that these happy memories overflow..then you'll realised that those sadder past memories are so distanced.

i want you to help me fill up my happy memory bank..

*me humming to a song...*

i've got peace like a river..

i've got joy overflowing...

i've got life everlasting...

=)