1. Your personal calling.
2. How your calling relates to the person you marry.

I find it personally interesting since I had to face the very same questions when I was in college, when I fell in love with a woman who was called to be a missionary doctor! (I'll save that story for another time!)

I would encourage you both to go slow on the intensity of your relationship with your friend and do a lot of talking and praying about who you both are, what your gifts and calling are, and how this may relate in serving the Lord better should you decide to commit yourselves to each other. I would also suggest that you find a wise counselor who can give you both objectivity. It would also be helpful to review mission agencies or the means through which you could possibly serve in a cross-cultural context in the future.

There is much more to "medical missions" than the physicians and nurses. Hospitals need to be built, well organized, and administered. When ill people seek physical help, they are particularly open to friendship and spiritual counsel. Hospital chaplaincy is a specialized field that can be very fruitful.

You and your friend may well find that your interests, abilities, and gifts could complement one another. May the Lord guide you as you explore what He has created you both for - and whether your service may be strengthened by joining your lives together.

In His Grace,

Jack