Don't hate me for saying this, but it's so hard to get motivated when you are naturally thin and trying to gain weight.
I don't hate you. I am also naturally thin and find that I actually GAIN weight while exercising. Muscle is more dense than fat, thus the same volume of muscle actually weighs more than the same volume of fat. Work out with weights and avoid doing too much cardio to burn calories. You'll put on healthy weight that way. Not weight that will be harder to lose if you ever need to later.
BFM
There is only one person who could ever make you happy, and that person is you. David Burns, Intimate Connections
