What does it mean when someone keeps to themselves?

I don't have much contact with other people, I don't talk much irl. I don't get many visitors, but idc. I don't go out much, especially considering it's rained 13 days in a row at some point in the day or night. I only talk to a few people on the phone & I don't like texting (people always reply when I'm driving (no I don't txt & drive,if it's important I'll stop in a parking lot to reply).