Lonely or just alone

I'm kinda confused I'm not sure if I'm considered lonely or just alone. I have 'friends' I think. I can't really talk to them though. I'm an introvert, i prefer to be alone a lot of the time, but when I really feel like I need to talk to someone I don't feel like I have anyone who would really understand me. Like I said before I'm an introvert and I come across as being unfriendly because I don't talk to people. If I don't know you honestly I don't want to know you. I'm very shy and sensitive I get upset at the little things. I don't like crowds or being around people, I can't even spend time with my family as much as I use to. I stopped hanging out with my 'friends' and doing things with I use to love doing (pool parties, shopping, going to the movies,etc.). I feel like where ever I go people are watching me and taking note of me so they can use it against me. I can't buy things at stores without feeling judged. I stopped doing things I used to love, I avoid situations where I have to interact with people. I'm a teenager and my mom makes me go out and hang with my friends. When I think about having to go to parties and such it's puts me in tears. I dont interact with people making me feel like I have no one to lean on when I need a shoulder to cry on. All I have is my dog, but she has a short attention span.
I don't want to be like this forever but I've imprisoned myself in my mind and I can't escape. I wouldn't know where to begin.
Please help!

Hello, Bumblebuzz12. Is professional help an option? Your post suggests professional intervention might be beneficial.

I wish you well.

No it isn't an option I've asked my parents and unfortunately to them I'm not qualified. My problems aren't serious enough to them.

Can you talk to a guidance counsolor at school ? I think you really need some help before this gets worse.

Take care