Terrible way to turn 18, I'm devastated

I (FtM) was SO glad to have finally broken up with my transphobic boyfriend and now I'm dealing with my really close friend telling me I'm not actually trans and really triggering me, my heart rate will not go down holy shit

A while back I liked an ftm video on instagram about misgendering and my friend texted me today because he saw I liked that video and asked why I liked it. That's an odd thing to ask. He then asked if I was serious about the whole transitioning thing and I said "yes bro ofc i am" because I AM!!!

"Is that literally why you broke up with that kid" "Yes" "I don't understand you."

He then proceeded to explain to me how my gender works and why I'm not actually trans and told me I'm one of the most feminine people he's ever met and that I never acted masculine since the first day we met. The next ~20 messages were him explaining why hormones won't fix me and I only feel "not like a girl" because of my antipsychotics (which, mind you, I haven't taken in months) messing with my natural hormones.

Him telling me I have no masculine properties whatsoever REALLY broke me and I don't know what to make of this. I really thought I had been nothing but masculine with my outfits, manners, haircut and voice. I thought we were gonna be there to support each other through our struggles. He's still typing hurtful shit in our dms as I write this out and I really wasn't expecting any of this. No clue how I'm supposed to react or reply to all of this.

Icing on the cake after my parents suddenly revealed that they aren't actually supportive of me and thought I wasn't that serious about it after I told them I wanted to see my psychiatrist again for gender struggles.