<human>: So my friend (26f) that I've known for over a year broke up with her boyfriend a few months ago.  I (25m) finally worked up the courage to ask her out a couple weeks ago and we had what I thought were a couple really nice dates.  I wanted to see her again after visiting my folks for christmas so I asked her out to dinner again and she said that sounded great.  

Later in the week I asked if she would go for a walk in the park with me since the weather was so nice, but she said she was busy (which was fine with me).  Asked her again the next day since the weather was still nice and we had plans to meet for dinner that night anyway, but she said she had been out late drinking with a friend and didn't feel well.  I told her that was okay and that I hope she felt better soon.

I was still feeling good about our budding relationship, but with my plans with her effectively canceled and not wanting to squander a Friday night I joined up with my friends and my brother.  I had told my brother that my plans for my date had fallen through so when we meet up with our friends he makes a big deal out of it and rubs in my face.  Telling me that she probably doesn't want to see me anymore and that "not feeling well" was code for wanting me to leave her alone and that I was about to be put back in the friend zone.

Now I'm feeling insecure and don't know what I should do.  I'd like to ask her out again today since our plans fell through earlier, but I can't help but think my brother was right and that I should leave her alone and give her space.  What does reddit think?  Leave her alone. Or am I being paranoid and I should ask her out again?

Can you summarize the given text in a few sentences?
<bot>: started dating friend was having nice time.  She canceled plans a few times which didn't bother me until my brother said some cruel things.  Should I take a hint and leave her alone or am I being insecure and paranoid?