# two boson gravitational interaction

If two bosons (or photons) posess energy and momentum, then they will interact gravitationally. If they approach each other to within a distance r, and r is small compared to their positional uncertainty then they can be considered to partially overlap. The gravitational interaction should then be estimated by the average over all relative distances and will certainly contain infinities due to the (1/r) nature of the gravitational potential. How are such infinities dealt with? Or did I get their occurence all wrong?