Life?

I am crazy. For months on end I have been spiralling down hill with my emotions and with everything. I stress over the little things, I over think on the pass and I feel like I have just been sulking for months and months.

Just today after another rubbish feeling of having a bad day I went for a coffee with my cousin and let out a lot of things and then I couldn't stop thinking on where I was going with it and I just realised that I think too much on too many things and thats whats put me this way.

I thought on my life and where I want to go with it and I want to backfire at everything I have been going through. My option was to start on my health, I want to get super fit. I already have a passion with my diet since I'm vegan so I thought 'why not put all the stress out in working out and work on that body that you have been abusing for the past few months'. there are so many ways that I am thinking of what to do so I can become a better person and I'm really excited to start everything up.

Even my attitude has just burst out of no where, I used to be a very fiery girl and I lost all of that when I thought there was no point to life but now I want a point to life and I want to move on from everything with no drama and I want to reach for every one of my goals.

My question is, is that I have many people who drag me down. One being my cousin, I would cut loose of having negative people in my life but I cant just get rid of a cousin who is so dependant on me. So how do I continue with this attitude and how to do I make sure I actually go through with my goals because I want this mood to keep up. I know it won't always be like this but I want to at least try.

Anybody else been through this? Any one been successful with where they want to go with life?... Any tip will help, thanks !