If your friendship gets awkward after confessing it means you're probably socially awkward. Don't say something dumb, just be honest and geniune about your feelings when you feel the time is right. This doesn't have to be rocket science. Don't be melodramatic though, you don't have to read her a poem, just be straight up and legit. No strings attached. If she's not interested, just go back to acting like how you did before you even told her and don't bring it up again.
And don't listen to all the "professor tweeny"s that tell you you're not in love. We can break affection down to neurotransmitters if we want, love is what you make it.