You think I'm high maintenance?

Do you think I am high maintenance? = Do you think I need a lot, or am demanding, or am expensive to keep?

Maybe also difficult to satisfy.

I think the dialogue makes it easier to understand better

Monica: Why didn’ t you pick me?

Phoebe: Fine. The reason that I was leaning a little bit more toward Rachel than you is just that you’re … just … kinda high maintenance—Okay let’s go to lunch!

Monica: That is completely untrue. You think I’m high maintenance? Okay, prove it. I want you to make a list an

Hey, is that supposed to be a sensible dialogue? I don't think this dialogue makes any sense at all. High maintenance means finantial maintenance? Aren't women supposed to be finantially independent these days? Difficult to satisfy? You mean what I mean? You mean something do to do with what I think you mean? I only talk about these things late at night.

Dialogue of this sort always got me That's why I seldom laugh at this kind of hilarious movies because I can't make head or tail of

high maintencance, wouldn't you use that for a computer or electrical equipment or sth?

I stick to my original, with the addition of constantly or regularly.
"I think you constantly/regularly require one or more of the following; affection, money, attention, *** maybe, material goods, conversation etc. to maintain your normal state"
Yes, it is normally required to describe equipment that regularly or constantly require service, parts or attention.

How about simply means ' someone difficult to deal with ' ?

Yes, possibly.
I must apologise, in my last post the last sentence should have read; Yes, it is normally USED to describe equipment that regularly or constantly require service, parts or attention.