What if for some reason I can mentor any more?
This is a very serious concern. Mentoring is a deep commitment. It will do far more harm than good to enter a young person’s life, build up trust, and then abandon the relationship. Be as honest as possible with yourself when committing to be a mentor — for everyone’s sake. If you aren’t sure about in-depth mentoring, try one of the many shorter-term alternatives, such as tutoring, or one-time projects.