<human>: So tomorrow I'm going to met my friend and tell her that I like her, the problem is that I know she's going to reject me (and I kinda need that happening to move on) so I'm going to do so anyway without any hope of something happening between us. But somehow I can't calm my nerves and a part of me is telling me that I should prepare a "Plan B" (because I told her that I was going to say something important and I would prefer to do so in person) and I have never done this before and tonight feels like I won't sleep.

Pardon my English, is not my mother language but I'm trying my best

Summarize the given text in a few sentences.
<bot>: I'm going to say to my crush that I'm in love with her but I can't calm my nerves 'cause is the first time I do it in person. Any advices Reddit?