One thing I've come to learn is that ~I~ can not decide for others how they should feel. Spare him the pain? You're not doing any favors to him by just breaking up with him to spare him the pain. These are his choices, and if anything, you're trying to spare yourself the pain. Now, I can understand the fear of that... but if you feel like you're doing ~him~ a favor, think again. How can you decide that you're not worth it? How can you decide that he shouldn't care about you? And while it's scary to have to wait for his final decision, I think that it's ultimately a choice that he should make... Of course, this choice is yours... if you can not handle a relationship at this time and it is causing you more stress, then it may be best for ~you~ to break up, for ~yourself~. This is how I view it.
But again, you know youself and him better than I do... but I've had thoughts about breaking up for my boyfriend to "spare him of pain", because I thought that I was hurting him more than anything... but I also can acknowledge that these are his choices, and that if he chooses to stay with me, that's something he decided... and that if I try to "Spare him of pain", I may actually cause him more hurt than I may ever know.
-----
That's my view of it, maybe it makes sense, maybe not. But if you do decide to see him, just call him up, tell him you're on crutches, and ask if he'll mind. Communication is key in any relationship, whether it be between friends, family, or a boyfriend/girlfriend. How he responds to it is not in your control, but you can at least let him know before hand so he gets the time to think to himself about how he truly feels about all of this...