<human>: Give me a shortened version of the text

I'm 21, she's about 21 as well, we met during dancing lessons six weeks ago. I get along quite well with this lady. In particular, we can talk without any end or inhibition, understand each other's sense of humour, etc. Of course, she's taken, but given that I have no female best friend she would be perfect to fill that position. The thing is, whenever we're together the tension and, quite frankly, arousal from having her by my side can become very distracting. My rationality is inhibited by her presence and I start imagining that she fancies me, so coming down to the realisation she doesn't after we part leaves me melancholic for the rest of the day.

Is there a way out of my misery? If I were to try explaining my reaction, I would say that it's simply because of the time we spend together and the attention she pays to me. (I've never had an actual romantic relationship, even though I once spent half a year flirting before she told me about her boyfriend.) I've had several similar episodes in the past, none of which ended favourably (with either a romantic relationship or a friendship). Key events in those episodes were sharing an umbrella, receiving dancing lessons, talking about lightning, discussing her art and receiving a hug in return. One time when it's gone well, I believe the reason it worked was because I got to really know her only after having met and befriended her boyfriend. He's my best friend now. In the case currently at hand, this possible solution is sadly not feasible.
<bot>: Would like to have a good platonic friendship with an ideal candidate but stupid me gets confused by excessive attention and kindness into temporarily believing she wants more.