why do people keep telling me this?

SO I was just talking to my brother and I was telling him about something my mom wants to do some weekend and so he starts complaining as usual about hanging out with the family. whatever that's not the bad part so then I start telling him about weekends is the only time I can even try to hang out with my boyfriend and he starts telling "oh i know you 2 aren't gonna last" and crap like that and Im about to strangle him. Worst part is that his girlfriend is one of those internet girls. From what he said she lives 400 miles away. I'm like that's pathetic my boyfriend lives like 4 miles away if I felt stupid enough to walk down the highway I could walk to his house. of course i'm not stupid enough to walk on the highway because of all those people who i sware get their lisences out of ceral boxes. My uncle thinks the same thing because of my cusions relationshis. GRR I'm sick of my people geting into my bussiness. It annoys the heck out of me. People trying to tell me that we're going to break up soon and they don't evenKNOW my boyfriend GRRRR!!.