21 year old undergrad student.
I have a couple of problems that are bad with ADD. I have a lack of motivation sometimes in everyday things and completing school tasks. I will start something and be excited about it for two weeks and then stop. Like starting a blog or completing a workout with the goal of being able to do 100 push ups. I get really excited when I start things, even when a new semester starts I get really excited with all of my classes and go all the time but as the semester goes on I start becoming uninterested and by the end of the semester I am on the verge of failing my classes. I feel like I build up good things and then before I reach my goals it comes crashing down. I just want to keep building things and not have them fall and have to start all over again because its just to frustrating for me and my parents. It even happens when I start a book I'm reading and I don't finish it.
P.S. I have a 1.99 GPA right now and I'm asking the school to keep me so I can complete the 9 classes I have left to graduate.

Does anyone else have this problem and what do you do to fix/prevent/change this?