How do I act normal?

So I've recently realised that I've been in love with my best friend for around five months. I mean, I'd basically do anything for this girl she means so much to me.

However she's just finished a relationship and told me that she's going to be celibate for the next five years till she leaves for Korea.

I know that I'll never get my chance to be with her the way I'd like to be, and I'm fine with that. Her just being my best friend is enough.

I just feel that I should tell her how I feel but I don't know how to do that without making it awkward or her pushing me away.