Change Is Not Always Good

I used to be a girl who's carefree, because no one was worried about me. I used to trust everyone a lot. I used to tell the World and express myself in every kind of way I could. I used to believe that the harm that the World could offer, wouldn't get to me. I believed that bad people are actually nice people and we have no rights to say that a bad person is trully bad. The World wasn't a cruel place to me and everything happens for a reason. But lately, I've reached up to the point where I don't really want to talk much. Not that I'm quiet, I mean like, I only talk on a basis of just talking and not giving information. I'm starting to hate explaning myself, I'm starting to get tired of people ignoring my efforts to express myself, I'm annoyed by the fact that I'm annoying people. Lately I've been keeping things to myself and it is hard. It makes my family worried that's for sure. I don't tell them about my feelings, about the arguments/fights I get myself into anymore or idk, how my day went. And it's becoming a habit, a bad one I guess. Now that I'm used to it, I keep forgetting to tell my family about where I am or who I'm with or stuffs like that. Like I said, I'm tired of explaning myself. And they're starting to not understand me anymore, I think they are losing trust in me because they feel like I'm doing things that I don't tell. When really, I didn't do anything. They feel like I'm going out with bad people because sometimes I slip out the bad things I just figured out (drugs etc) and they think I revolve around those things. How do I show them that I still the same kiddo they knew? I hate losing my loved one's trusts. It makes me feel like I'm no longer safe to be out there. It makes me feel like i should just stay at home. It makes me feel like I know nothing of the World. It makes me feel like my opinions don't matter. For example, I know a certain thing and I'm sure I've done it quite a few times, but with people around me that keeps doubting what I can say or do, it makes me feel like its better if I don't say a thing. But boy, it always gets me in trouble. Like that one time, I became a shot gun and i knew the road but I have people around me who thinks I don't, so I just kept quiet and let the driver decide instead and we ended up on the wrong road and had to go back to the road that i was very familiar of. Do you get me? I'm too scared of being a dissapointment that I don't trust myself anymore.