Why do some people have a problem with homebody people (BE HONEST)?

I am one and my friends get frustrated with me. I always decline when they haven't said the date yet they told me and I need to stop making excuses to not go places and try new things. My best friend even said I need to get out more and I spend too much time by myself. My guy friend says I'm weird for wanting to go to bed early on a weekend (Friday night or Saturday) and that's so lame. He said, "That's right I said it. You act old! Like a grandma! You're a 22 year old homebody that needs to get out and explore the world. It's weird that a 22 year old would be in bed by 9-10pm on a Friday or Saturday night. You act old. Live a little! You spend too much time by yourself."