You want to hang out with your new sweetie. Your parents want you to get good grades. It can be hard to do both, but it's not impossible!
When your significant other (SO) has work, class, or wants to spend time with his/her friends, bust out your homework! You can be productive and keep yourself from missing him/her at the same time.
Have a study date. You can both work on your homework side-by-side, or else you can do your homework while your SO reads a book. Got an exam coming up? Your SO can quiz you. It's a lot easier to remember what "anaerobic" means when your sweetie explains it than when your professor drones on about it.
If necessary, prioritize. Take a full day to concentrate on that portfolio you've been putting off all semester, and reward yourselves with dinner and a movie the night after you turn it in. Your sweetie will be there on Monday, but your chances for getting an A won't be.