DP Lives about 15 minutes drive from me. I text him to ask if I could borrow his keyboard as I was having piano lessons and couldn't afford a piano/keyboard. He text back asking who was giving me lessons. I replied saying "just a friend". Then DS text me saying he'd left the club he was at and would I go and pick him up. I replied "Ok, on my way x". However somehow this text went to DP. I text him immediately afterwards saying "sorry about that, wrong person lol" and thought no more of it. I then got a text from DP saying "why who is it for??? a kiss on the end??? where are you going??" Before I had chance to reply to that I got another text saying " and which 'friend' is giving you lessons???" 
I was driving by this point so I left it until I'd parked and then sent a text saying "chill out! I was picking DS up, that's who the text was for!" so he replied saying "Ok sorry, but who is giving you piano lessons?"
AIBU to think this is a little scary??