If this is the case, honestly I think you will be fine living at home/commuting in, if that's what you choose to do. I'm pretty similar in that I'm not the most social person in the planet and don't go out all that often, that being said I do still get involved in college events/sports etc. The only thing I find annoying about commuting in (and again is dependent on your course and how much you wish to engage with college) is that you may have awkward or long gaps in your timetabling or if you want to attend a formal it can be a bit annoying bringing everything in - I just asked a friend if I could drop my clothes for formal off in their room and change there too which they were fine with. Apart from that I will say commuting in does save you a lot of money at least in my experience.