When a girl tells you she's lonely what does it mean?

Ok so this girl recently told me she's lonely. She's living in shared housing but doesn't really get on with her housemates. She does have uni "friends" that she messages. She recently split up with her ex because of he was narcissist. But then says to me that she has no one she can go with to things she wants to do. She wanted to go to this parade thing and said to me I should have come down that weekend.

Background:
I've known for a while now. She's told me she's co-dependent on a guy. She's 23.

I met her the first time. She was engaging eye contact (which she told me she does to a guy for a quick lay etc) twirling her hair, saying that she was shocked she feels comfortable with me, she stumbled a few times and invited me to go to her favorite coffee shop next time I visit. She messaged my best friend the next day saying I was being difficult, messaging her loads. She spam messages a lot like up to 10 spam messages a time.

The second time I saw her, she was slightly nervous. I saw her again the third time, with a female friend of mine. I visited the city cause it was my birthday so I had other plans whilst there. She told me she bunked off work to meet. I invited her to a comedy gig as she was feeling low at the time to cheer her up. My friend noticed this girl was off with her. She invited us back to hers. My friend also noticed that she kept gravitating around me a lot, mirroring me that sort of thing. She does have anxiety. She contacted my best friend (not the female friend who was with us) saying that I was being difficult again.

When we message she'll send selfies, she's sent quirky videos of her singing, kept mentioning about her boobs a few times, memes or emotional videos she likes, opening up to me.
When a girl tells you she's lonely what does it mean?
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