I dont know if I should go for her?

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my situation is very different
there is this girl that really likes me (I think) and she is going off to college by autumn
she will be faraway out of my reach
This school semester is possibly the only and last time that I will ever get to see her

adding her on social media would be weird cuz we wouldn't be in contact in real life

time is running out, and I only have one shot here
I don't know what to do
im very shy so that plays a role