Losing friends + going mad

Hey,

well it's thursday night, that's right new year's eve, I live in France, and from the time here I've got 20mins before I spend my new year with my parents downstairs.

Over these past few weeks, or months more like, I've started to feel a change, I've felt more bigheaded, more proud of myself, I take myself as a leader, dressed in classy clothes, etc... kinda like Peter Parker in Spiderman 3 when he turns to the dark side.

Over these past few weeks though I've lost friends, I've said to them I'm sorry for certain actions that Ive done, like not replying to their message, etc... but all they can do is criticise me saying how different I am, etc... and well I feel like I'm losing my mind.

How does one get to know one's self?

How does someone find inner peace?

You see I've become more obnoxious, bigheaded and "me me me" because all my life I've been that friendly guy who brushes off bad things that comes his way, and listened to other people's problems, etc... And now I can't take it anymore! doesn't anybody want to hear what I have to say?!?
That is what turned all this stuff on me, I started saying stuff about me a bit too much, and I started to feel more self-conscious, etc...
And I've lost that friendlyness I had, because I feel like the world was on my shoulders...

And now, 10mins before new year, some who are still my friends are with my ex-friends partying at their house and I'm left alone.
It's just a matter of time that they all turn to me, because I've realised that once I've made a couple of minor mistakes (not big mistakes like cheating) they start to turn on me, and there's nothing I can say or do to change their minds...

Help Me please...