Losing myself

I don't know what's happening with me.I'm not the old self.I used to be bold and meet my problems face to face.I don't feel like myself anymore,like some alien has occupy my body(that's a bit too extreme).

To add to it,a close friend seems to lose faith in me.That despite how I am in the outside,I still have a good heart...etc..etc.He just don't buy that anymore.

I'm having a severe identity crisis.Which is bothering me.My father would know how to solve this,now that I am on my own,I'm not sure where I should begin..what am I looking for..