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

My girlfriend and I have been seeing each other for the last 3 months and things have been going really well. A couple of days ago whilst we were in bed, I wanted to tell her that I love her for the first time. She was looking at me and knew what I was thinking and told me not to say it. I asked her why and she seemed evasive and we dropped the topic and cuddled. 

I'm upset that she doesn't want me to tell her how special she is to me and how I feel about her, but I know she's had bad relationships before and could just be linking 'I love you' to something terrible. She was repeatedly cheated on in her last relationship for over and year and was tentative when we started dating, but I told her that if she wasn't comfortable with anything, then I wasn't either. 

Should I tell her how I feel about this? Or should I drop the subject entirely as she already knows how I feel without having said the three words, until she lets me know she's ready?

Any advice would be great.
<bot>: Girlfriend of 3 months knows I love her, but won't let me say the words, possibly because of previous bad relationships and it's playing on my mind.