I am most definitely a person who enjoys being alone. I can be a total hermit at times, and have to remind myself to reach out and make contact with friends every now and then. I'm a stay-at-home-mom, but that means that I'm actually afforded very little alone time. Basically, my only actual time alone is while my toddler is napping. It can be really draining.
Before having kids I worked in really social industries, which could get really irritating, but I was able to balance it with some really quiet evenings at home, especially when my spouse was working shift work... I kinda loved coming home to an empty house and having no one else to focus on. lol
I'm not certain that ever really changes... if you're an introvert/thrive on solitude, I think you'll always be that way. The trick, I think, is to find someone else who also enjoys doing things by themselves, or has hobbies that are outside of your interests, so you still get a bit of time to yourself.
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