Is it my Mum and sister, or me?

Hi! I'm 20 years old and a guy. I'm still living at home (local Uni, and I work part-time). I just feel down due to some of the things my Mum and sister say. E.g it's 9:12am. About an hour ago, I woke my sister and said to her "don't you have work?". She kinda rolled over, half asleep still, and said "piss off". I've just left her to sleep. If she's late and gets told off, I don't care. I like to joke around. I was dusting the house (because my sister doesn't do absolutely anything) and my Mum was falling asleep on the sofa. I put the duster under her nose so it'd tickle her. She woke up and said "what are you doing? Leave me alone you horrid little boy". i work in retail and I like talking to people. Not every customer is pleasant, but most are and I like talking. I hate being quiet and on my own. Yesterday I asked my sister if she wanted to talk to our Dad on the phone. I was in her room and she said "no now f*** off" and slammed her bedroom door shut. My Mum was downstairs,and obviously I get the blame... "What are you saying to her?". my sister (she's almost 18) was shouting at me the other day and calling me a failure. I've never had a girlfriend, I've never got drunk, and due to distance from Uni friends, I've not seen them much this Summer (we're meeting up next week and I can't wait really). I just felt like crying and I was thinking about things I'd done in life... Graduated with a 2:1 on a foundation degree course, got into the last year of Uni to make it a full degree, got a DDD in Btec media, so I thought I'm not going to let her do that... It sounded vile but I reminded her of how she took 4 attempts to pass her driving test. She soon shut up. A lot of brothers and sisters I know seem to get on. She's completely different and my Mum can say some bad things. When our cat was a kitten, we didn't want her going out. My Mum was near the sliding patio door and the kitten was on her way out. I said to my Mum "quick shut it, or she'll run out" (she was next to the door). She did something and banged her head on the door whilst closing it. She then ran after me and was ready to thump me. I said to her "what are you doing?" And she was angry and blaming me! It's not like I did something to make her bang her head on the door is it?! i will admit I did use to annoy my sister in the past, just playing about, like saying there's a spider on her head (she hates them) but she would just swear so much that I'd stop bothering. I've agreed to so much overtime at work. Somewhere I can just speak with people. Is it me who needs to change? I can't stand it :(

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