Decisions Decisions???

It's that dreaded time of the year again for me...should I stay or should I go? I have to make my decision again on whether I want to stay for a third year or not? I am half convinced that I should stay, but I'm also leaning towards going home.
Why do we have to make choices in life? Why can't life just be all smooth sailing and that what ever it is you have to do is pathed out in front of you and that you just have to travel along each day...I've met a friend through this blog site, he's advice was "...there are a lot of times in our lives when we are not sure what to do, If we could only see into the future it might make things a lot easier." That is so true. How I wish I can see into the future and see what's coming my way. But that spoils the element of surprise and what we call "Life"
What I should really do is listen to my heart and follow what it says, if I can't trust myself and my own judgements, who else can I trust right?! Another friend asked me to think about three things at school today to see whether it's a good idea for me to stay or not.
1) Is there more I think I can/want to achieve in Mizukami?
A: Yes, there are lots that I can and want to achieve in Mizukami. I want to be better at dancing, stabilise my relationships with people here, learn the language, see more of what I haven't, meet more people that I haven't had the chance to meet yet. There are so many things to do here, that I feel if I leave now, time is running out. This is a once in a life time opportunity where I can be selfish and think about me and me only.
2)How did I feel about Japan when I went to Taiwan&Australia? Did I miss it a lot?
A: Yes, I missed Japan and my home so much when I was in Taiwan and Australia. Thing is, when I was in Taiwan it was with family. When I was in Australia it was also with family. Therefore, it wasn't that lonely. I fit right back into the Australia life. I felt like I've never left. The friendships picked up right where I last left it, nothing has really changed except for friends getting married, having kids. That's their choice, and my choice was to stay in Japan. And I'm glad I did because I've achieved so much on my own. Made so many "firsts" in Japan. Can I just let it all go?
3) Today when I go to work, think about how I'll feel sitting in this same chair another year onwards, assuming nothing has changed.
A: It feels great to be here. To see the children get more and more involved in English. Seeing me get more and more involved in their life. Teachers are great here.
From this, I can see more pros than cons. But why am I still so confused. Is it beacause I'm not getting any reassurance from family...Mum and Dad are just keen on getting me home. But that's because I'm their youngest daughter who's been overseas for more than a year and a half now. My goodness, this is so frustrating. I want to cry...HeLp!!!