Making him feel that you believe in him will work better than nagging him or begging him to get back on his feet.
Another option is to threathen dump him. But if you really love the guy, it may be hard to do. So you have to see what's works best for you two. There are guys who would do anything not to lose their girlfriend. And then there are those for whom this argument won't work and who really need to know they have your unconditional support.
You know your guy better and need choose whether or not to play "I love you but if you don't do it, I'll leave you" card (even if you don't really mean to). In any case, a woman's task now is to wisely help a man, using his desire to impress you. With time, you will be able to tell him, 'I'm so proud of you!" (preferrably, in front of your parents). In this way, you will create a lasting and successful relationship.
