<human>: Can you provide a brief overview of the text?

EDIT: [24 M] here, ugh sorry having a lot of issues here apparently 

Long story short, I know this girl because she used to date one of my best friends for a year or so. After the end of their relationship, we started "talking" briefly, and went out a few times, but she ended up in a relationship with another guy shortly thereafter.

Fast forward to now, she is single again. However, I haven't had contact with her since I tried to date her, which was around a year ago. I'm not really sure if contacting her at this point would be weird. We aren't facebook friends anymore since she seems to have started a new profile. I do have her number, but I would feel awkward about texting her.
<bot>: Girl who used to date one of my best friends, who I was "involved" with after they broke up, is single again but I'm not sure how to get back in touch.