Was she flirting with me?

I was at a party and sitting on a chair by myself. A group of people I don't know coincidentally end up sitting on the couch opposite me. After about a minute, one of girls comes over and sits on the chair next to me. She introduces herself and we just talk about basic things.

During the conversation she shakes my hand, randomly gives me a high five and randomly touches me on the bicep. I was wearing a short-sleeved shirt and she initially grabbed that, but after a few seconds purposefully moved her hand down to just my skin. It wasn't so much a touch but moreso a grab.

For some reason she also introduced me to her girl friend but not her guy friends. She eventually left, shaking my hand, when her friends wanted to go somewhere else in the party, but she sounded disappointed and like she didn't really want to.

Do you think she was flirting or attracted to me?
Was she flirting with me?
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