<human>: Condense the text into a few key points

Basically what the title says. I told her I had to tell her something in person, we met in my car, talked. I told her how I felt, she said thanks and smiled...

 But she didn't say it back, I told her before she didn't have to, that there was no pressure but obviously I was hoping to God she would. We talked some more after and she said she wasn't weirded out at all which is good, things weren't awkward after I said it. We've been in a relationship 6 months now. 

What does this mean? Should I be worried? How is the relationship going to change now?
<bot>: said I love you to Gf of 6 months for first time, she didn't say it back. Should I be worried?