magz is providing excellent advice above, which I fully back. I'd also like to add that, in my personal experience, it helps to divide your free time amongst your various activities, so you might be able to plan a social get-together within a set timeframe. When I went from a period of unemployment into a full-time job, I also found that I needed more alone-time in my off-hours and weekends. But now that I'm one year into my job, I can balance my me-time and my social time.
To give a bit of a vague example, you could save your house chores for Sunday, and then plan something with your friends on Saturday. Or just meet them on one random weekday evening (catch up, have some drinks), and then have your hands free and your mind rested during the weekend. TL;DR prioritize your personal time so you can unload, then see your friends in a pre-planned setting. And obviously it doesn't have to be every week (I have no close social circle, and sometimes a month or two passes that I see anyone in an off-work social setting).
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clarity of thought before rashness of action