Running On EMPTY !

I can't sleep! I can't sleep! No amount of sheep counting will work. I was in the thousands before I gave up! I'm getting those anxious feelings again. It happened before. Actually it happened right before I moved to London. I had that rushed feeling of time running out on me. Who the hell made up "time" anyway!? I only have 2 months left and it's clearly not enough time! I need to stay longer. I want to stay longer. I can't stay longer. I already promised my parents, friends, my dog...etc that I'd be back by the end of June. Actually, I have two close family weddings to attend as well. I'M NOT READY TO COME BACK YET. I just don't know what to do. And I can't just come back for a visit bc the UK will not let me back into the country (visa issues). What do I do? Do I tell them the truth?? (I don't want to come back right now. I want to come back after summer.) Am I an evil daughter? And every time I causally mention that I am not ready to come back, they get offended. My bestfriend doesn't even seem to understand either. She can't understand how I can be away from my friends & family for so long and not want to come back yet. The thing is I do miss them. I miss them all v. much. (I'm homesick on a weekly basis)But I'm just not ready to come back yet. It's that simple. I came all this way to "find myself" and to collect my thoughts and to finish my portfolio and in that process I came to realize I'm more confused then ever before. I want to feel peace with myself before I decide to come home. I'm not at peace yet. Am I just scared? Am I being a big baby? Should I just suck it up and grow up?