<human>: Can you summarize the given text in a few sentences?

I am a musician, and have always wanted to be a musician my whole life. I grew up, and currently live in the bay area. My best friend from high school also wanted nothing but to be a musician, and made the big step to move to LA. He's "made it" in the industry. Well he comes back to visit every now and then, and last time he came back, he said he was really digging the stuff I've been doing, and wants me to come work for him in LA. I'm thinking, holy shit, this is the oppurtunity of a lifetime. There are people that would kill to be in my position.

The only thing is, that I have a family up here in the bay area. I live with my GF and her sister. We have a very elderly cat who needs special care, she needs kidney fluids from an IV bag every other day, she is on a special diet that we have to be present for to mash up her food for her because she has about 4 teeth left, so she can't eat dry food. I also wouldn't be able to take the cat with me because I plan on asking my uncle who lives in LA if I can live with him for a while, and he is allergic to cats.

Growing up, my GF moved a lot, so moving gives her a lot of anxiety. I know her sister would never come with us because she has a job and boyfriend up here, and I know my GF wouldn't want to leave her sister (Also her best friend). 

What would you guys do? What can I do? I've spent the last few days running all kinds of scenarios in my head, of trying to figure out if I can come home every weekend, but I wouldn't be able to afford the gas.
<bot>: I'm being offered the oppurtunity of a lifetime, but it requires me moving away, and my GF probably wouldn't come with me.