<human>: I'm meeting up with a friend tomorrow who has been diagnosed with cancer. Her prognosis is relatively good, but she still has to do chemo and will experience all the unpleasantness that comes with that. I would not call us close, but we clicked when we met and she kind of looked up to me and came to me for advice on things. 

We see each other every couple of months, sometimes more frequently, sometimes less frequently. My affection for her as a friend is genuine, but I'm extremely reserved around people and don't typically hug or express myself verbally about how I feel. I show my affection by doing things for people or giving them small gifts. So when she told me what was going on I made sure to tell her that I care about her and I'm there for her for whatever she needs, and suggested a few specific things I can help with(I read it's better to offer help with specific things).

Anyway, I'm a little weird around people to begin with and have a lot of trouble in social situations. I have difficulty knowing how to interact in everyday scenarios(like someone saying hello in the grocery store), and I have never had a young friend go through an illness like this. I'm very concerned that I will say or do the wrong thing. 

We are meeting up tomorrow and I'm really concerned about acting in a way that makes her feel bad. I feel this way because we were chatting earlier and she mentioned something she felt about her illness and I just started crying. I couldn't hold it together at all. I felt so incredibly bad that she has to go through this at such a young age that I couldn't hold back the tears. We were not on the phone, so she is not aware(thankfully). What if I feel the tears starting when we see each other? How do I hold it together? I don't want it to seem like I am making it about me or something. I'm naturally a very empathetic person and it's easy for me to cry over the tiniest thing involving another person being hurt(even animals, people in movies, BAD people who probably had it coming, etc.).

Can you summarize the given text in a few sentences?
<bot>: My friend is sick, I feel terrible for her. How do I keep my teary ass in check when I see her?