Are they interested in me?

I (26M) met this person (?NB?) at a bar a couple of days of ago. I noticed them as soon as they showed up, but didn’t say anything to them until after they did a song for karaoke. I complimented their voice and we exchanged names. Eventually they asked for my Instagram to which I gave it to them, followed by me saying that I’ll text them soon. They responded with, “Please do.” Those words have been on my mind since

We haven’t talked too much since then. They commented on how their social battery is gone and may take a few days to recharge, so I’m hoping to hear from them again and hopefully make plans to go and do something together. I asked my friend what she thought and she said they were definitely flirting with me but I’d like other opinions on the matter.