Biological Clock

It's been awhile that my biological clock turn upside down. I will feel awake and energetic on night time till early morning and feel sleepy on morning time. My sleeping time is from 2 am to 3 am and now become 6 plus am. Which i really need to adjust back to normal and sleep around 12 to 1am. Aaah! any suggestion what kind of solution to turn my biological clock back to normal. Damn, my bf remind me get my ass off from house and be active on day time so when I'm feel tired i will sleep early. But the problem is I'm lazy going out if i don't have seminar/lecturer on that day. Maybe it's age catching up issue since normally only aging people got issue with biological clock matter.