Melody - just to add my tuppence worth here.
I've only just joined but it sounds like things have moved on somewhat from your first post here. You don't seem so much in doubt of your sexuality now, and mainly seem concerned about parents/relatives, and the boyfriend/marriage pressures.
But if the sexuality issue still worries you - don't let it. Get yourself out there and meeting gay/bisexual women (even though they're predominantly Caucasian here), and see how you feel in that kind of environment (excitement and happiness is a pretty good indication!). Falling in love with another woman is also a sign..! But despite the "it's just a phase" dismissiveness, remember the truth that nothing lasts forever, and stay open to change. At different stages of your life you may have different desires, even though for many of us being "lesbian" is a pretty fixed part of our identity, some aspects may be mutable.
Don't worry about whether you "look the type" (your presence in a lesbian bar may be enough of a giveaway, and these days hopefully most lesbians won't go by looks anymore, although it is true that it is easier to "get spotted" if you're a short-haired butch). Forget about labels - you don't need them to justify yourself to anyone else, and those who want to see just the label aren't worth the effort anyway. You just need to find out for yourself what you want. And in that regard I know some women who consider themselves lesbians, who only fall in love with women, yet can enjoy sex with men on a physical level. Labels can be debated endlessly, your time will be better spent on rather more pleasurable pursuits.
Also don't fall into the trap of just seeing the labels, in turn. People are people, whether they're Chinese, or lesbian, or both. Don't automatically assume that if you meet another Chinese lesbian you're going to get on, still less than that she'll treat you like a long lost sister. You should have a lot in common, of course, but that's not enough - there are other aspects, e.g. class, other values, just plain personality (in)compatibilities, which may mean the differences between you are greater than the commonalities. Just a word of warning there in case you get disappointed. Be careful.
As for people to talk too, I'm sorry your friends mostly seem negative or dismissive. At least you have people here! But I know it's not the same as friends IRL. Again my suggestion is that you meet more people and hopefully make friends who will be more sympathetic and willing to talk - some str8 people are, you know. One of my best friends, who knew me before I came out, is white and even Christian (an active Catholic), and I hardly see her these days but we know we'll be there for each other if necessary, and she was tremendously supportive. Try and get yourself a network of true friends who want you to be happy.
Finally, my own feelings about coming out to family may be different from other people's. Information is an interesting thing - it can go round the world in an instant, exactly in the same form, or be distorted in passing. (Chinese whispers, hah!) But my main point is that once the genie is out of the bottle, you can't put it back in. Once your family know, they know - you just can't make them forget it afterwards, however much you may want them to. So I would make sure of the ramifications before I told them, or even hinted. I'm glad you don't think yours would disown you, but I have known of families (not necessarily Chinese, admittedly) where that has happened, or where the reaction, at least initially, has been far worse than originally expected. Conversely there have been cases where the family have been surprisingly supportive. But only you know what your family are like, and you (and perhaps other close family members) are the best judge as to how they will react. You seem to have conflicting feelings about it - the fear of bitchy relatives, yet your leaving gay mags around (are you sure they haven't noticed? Maybe they have picked it up - you do sound like you've been rather obvious! - but just want to avoid the issues?)
In my case I am now pretty sure my parents know, though I have never told them, but we just don't talk about it; they stopped asking about boyfriends a few years ago, and my mother at least often says to send her love to my "flatmate" when we speak on the phone. It is far easier for them not to know officially. And from a compassionate viewpoint, thinking of their feelings - I want to spare them. They're getting on, and I believe they will be happier with things not being out in the open, where they have to face the issues head on. But that's me, and my own family - I'm not actually that close to them anyway, in many ways I'm not stereotypically Chinese at all. You need to work out what's best for your own situation.
Good luck.