my boyfreind has the same problem, motivation is a hard thing to capture, i often start paintings and stories only to stop without any provocation to resume. i can give a little advice, not too good, but from my and others personal exprience: live in advance, dont live for one day at a time, live for the next few years at a time, it will make you feel more accomplished and happier to know that though there are struggles to overcome, you will be secured in the future.