Is it just me or What?!

I was driving today down I-45 and while i was getting on the on ramp some dude was within 3 feet of my car. This wasnt for a very long period but anyone who knows that freeway knows that it merges alot of oncoming with freeway tracffic so I had to be cautious not to gety both of us into a wreck, but this is nothing. There once was a time some crazy man rode my tail from 610N and 290 all the way till 59N It seemed as if he was pushing me =\ literally cause I dont recall hitting the gas to stay at 70mph. I guess thats just life in houston and I guess you have to drive like a bat outta hell to balance with all the people going 55mph but dam a 3mi tailgate isnt cool or safe, people should think before they act or people could get kill =\