How do you deal with anxiety from revealing your feelings for a girl?

So I'm going to tell my best friend that I like her... and I honestly don't know what the outcome is going to be, it's really 50/50.

This is just so much stress and anxiety for me, she's out of town right now so I can't just get it over with soon. I have another 2 weeks before I'm able to do anything about it and I need methods for dealing with this stress. I'm having troubles sleeping at night too, not usually falling asleep until 2am.

It's very difficult to just get it off my mind. I can be fine one moment, but naturally I think about and talk to her a lot, so I'm always shooting back to this impending doom that I'm going to face.

This is just a really really important point in my life for the next year, and the proceeding 5 years. Honestly It's just so huge, I can't even handle the stress.

To make matters worse I have absolutely no one to talk to this about!!! Because she is my utmost best friend I have, and anyone else I talk to would tell her (I also have poor relations with my family).

I just need help.. Thank you for all responses, you're all beautiful!
How do you deal with anxiety from revealing your feelings for a girl?
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