Is it normal that i prefer to hang out alone more than with my friends

I have a lot of friends. And I pretty much like them all. I try really really really hard to make all of them happy. And I think its started to twist me somewhat. I used to spend a lot of time alone when I was little because I wasn't liked very much by the kids in my neighborhood. As I got older I eventually gained more and more friends which is something I couldn't have liked more. My friends for so long meant more to me than my family. I started working when I was 18 towards the end of my senior year. I bought a cellphone. I am now 20 and I must say I wish I never had one sometimes. Once it was known I had one I began getting frequent texts to hang out with people. With my new job came a whole new set of potential friends as well. Over time I began to hang out with a lot of people. It became pretty much everyday. I stand now in a time of desperate help it seems. For I have grown very bitter the past few months. I normally loved hanging out with friends all the time but it seems like I started to miss my alone time. Since the summer I have started to see less and less of my friends. I found myself making up excuses to not hang out. When I was at the climax of hanging out with people I was making excuses just because I was already hanging out with someone. "Yea we'll hang out" and then that next day I would get called. If not by them then someone else. I started to get more and more frustrated trying to balance everyone out. And to no avail was anybody ever happy it seemed. Every day I had to turn someone down and then felt like crap every time because I knew they really wanted to hang and i really wished I could. Over time I started getting more and more frustrated and eventually angry. I started not hanging out with a lot of people. I began begging for alone time. I started spending more time in my room playing my videogames because I really enjoy them. I still hang out with my friends but it is no where near what it was. I tend to make many excuses to not hang out. And I still get called so much but I've begun ignoring them and getting angry because of how much I get called and texted. It still feels like I never get to be alone or enjoy time at home. Balancing all these friends on top of work and college I feel has just bent me. And I truly don't know what to do. I have never considered trying somethitg like this until now . Please if anyone can even point me in the right direction. I feel so wrong because for so much of my life I begged to have friends and people who always wanted to be around me and now its become this . I feel like an ungrateful jerk. But its seriously so stressful especially dealing with the friends that take offense when u try to explain nicely that you just plainly don't want to hang out with nothing against them at all, just simply wanting to spend the day relaxing and enjoying time alone maybe doing your favorite hobby.