I'm happy for you bro! Even tho he is not high on the list for the guys I would like to see plow my beautiful girlfriend, I think he might play important role in the plot to help MC on the good path if you want to combat whatever evil stuff is going to happen in the background. He could have important information from the streets and even pull a few strings with some shady contacts, will see, but that is my hunch
Also... if there would be a route where you take him from the streets and bathe, clothe and feed him, so he can then become a roommate of yours at least until getting job/his own place... would you be interested in that or that would ruin his "filthy" charm?