Will 'let go' takes forever?

I received few sms from LT which she needed me to translate them from chinese to english. Well, she is not chinese educated. I dont know who sent her those sms, but my mood was suddenly down by translating those sms. The contents was nothing special, just a few casual chat sms. But i just wondered why, they made me missing her so so much. My tears wanted to sneak out from eyes but i held them. After 7 months, seem my feel towards her had not reduce at all. I want to hug her so much but that will be a forever dream, i know that... How long really need actually for me to let her go? Or that will take me forever? .....