<human>: I started dating a good friend of mine, and it was going well, but she broke it off with an ambiguous text after the 3rd date, saying she "deserve[s] better". 

After that text, she wouldn't respond to me anywhere or acknowledge my existence in person, so I couldn't get a reason out of her. 

I spoke with a mutual friend, and her younger brother who likes me, and found the reason was that she thinks I flirt with other girls, and I can't commit to her.

My own friends verify this, telling me I'm too flirty at times, but I don't really understand, because it's just the way I've always interacted with people, but now it seems I've built an image that this girl can't see past.

She's afraid that I'm just playing with her emotions, and she won't let me in. It's been two weeks now.

Yesterday, I tried giving her a V-day package, with a ton of candy, a standard v-day teddy, and a card I made for her, apologizing for my behavior, but she wouldn't look at me when I entered the room. I placed it by her bags, but she left with them, pushing the package aside.

Do I stop trying? Do I force her to hear me out? What's the best course of action and what am I missing here?

Can you give me the gist of the text in a nutshell?
<bot>: girl friend won't talk to me because she thinks I'm hitting on other ladies on the side. What to do now?