re: I'm tired of being skinny all my life; can you guys help me?

I was in the same boat coming out of college. 6' about 150 to 155 on a good day. The only thing that has ever helped me gain weight/muscle was squats, deadlifts, compound lifts. I'm up to 180 now but that has been steady the last 5 or so years. Do a linear progression program like starting strength or 5x5 strong lifts that focus on the big lifts. Then move into a more complete program when you stall out a couple times.

Get a quality mass gainer/meal replacement like Axe and sledge Homemade Core MRP. Just add something like those in between your complete meals.