The world doesn't have enough dedicated, hard working mentors. As a mentor, it's great if you put a lot of effort into your protégé. However, don't overstep your limits when it comes to mentoring. Every mentor should have the right to their own personal time: don't let your mentoring relationship rule your life. Try to find a good balance when it comes to mentoring, and make sure that you are spending the appropriate amount of time with your mentee.