I have an unstable personality...

When I wake up in the morning, at first, I don't know how I'll be. Sometimes I'll be happy, and sometimes I'll want the day to just get over and done with so I can go to bed.

When I'm happy, people say calm down. When I'm calm, they think there's something wrong with me.

Yesterday, I was in this really weird mood where I wasn't happy, but I wasn't sad. You know?

But, no matter how hard I tried, how much my friends begged me, I couldn't smile.

What can I do to be one way or the other? o_o

You could potentially be bipolar.

Or it can just be the teenage hormones. My mood changes around a lot too.

I really hope it's the second one. My doctor already thinks that I'm borderline suicidal, even though I haven't (intentionally) cut myself in two months.

Exactly me, I dunno how it is but it is, because of that it's hard for me to answer simple questions like favourites cuz they change pretty fast... the thing is now I don't know who I really am cuz I don't even know what I like or how my mood is going to be throughout the day, it's really frustraiting. I think it's from the way I was raised and how everything was up to my mum to the point where I lost control of my personality and so when my mum wasn't around I "stole" the personality of whoever else was with me.
Now I'm trying to look within myself, by meditating, going to the beach and nice calm places and doing what I want to do for a change instead of basing the way I live on the way other people live.

It's called being 15. You can't do anything except make the best of it and know that it'll eventually pass. It's a mindset- I know it's hard to get out of but it's not impossible.

I agree with the first answer that there is
a potential chance of bipolar or
just teenage hormones.
I'm 17 and often find myself getting sad
for no apparent reason and sometimes not understanding
how I feel at all.
I guess its just normal and happens to all teenagers.

This is exactly me and people don't help you out there.
It is a terrible feeling.