<human>: Can you succinctly summarize the text in 1-3 sentences?

My cousin has been struggling with anorexia. She's dropped out of school and refuses to talk or see anyone except her immediate family and only because she has to. I thought what she needed was space so I didn't try to push her too much. It's been almost a year since I've last seen her and 6 months since I've spoken to her. I've messaged her several times suggesting I come over, watch a movie, and drink some hot chocolate but she never responds. I would send a couple of texts now and then just asking how she's doing and I'd update her on my life.

On Christmas, we had a family dinner at her house. I saw her for maybe 2 minutes and all we said to each other was "hey". My step dad stupidly said, "Hey, you've gotten so pretty!" and she immediately retreated upstairs into her room, locking it. She was on the verge of tears. I didn't try to follow her because I recognized how uncomfortable she was. She use to laugh all the time and make jokes, but when I last saw her... She looked so broken.

I feel like she needs to start talking and interacting with friends because I think if she is alone all the time, the urge to avoid everyone will only get stronger. She and I have always been VERY close. I've been her confidant and she's been mine. I don't know what to do. I'm her closest friend but I don't even know if I'm the best person to try to help her. She's told me before that she wishes she were me because I'm naturally slim and I feel like she compares herself to me. I don't know if my presence will make her more depressed. All i want to do is help her. Her parents are really worried and have reached out to me. Please. Let me know how I can help her. Should I be more pushy? Make her talk to me? or do I leave her alone and give her space?
<bot>: My cousin is going through a hard time, shunning herself from friends and family, and I need advice on what I can do to help her.