I got / stay sober for all different reasons, so I am not 100% behind the "you have to do this for yourself" mentality, I believe others benefit from ones sobriety at a very basic level. If your desire to be friends with this person got you sober than why not keep that way and maybe learn to be friends with yourself. This is a job within itself. Quite a trip actually.
Personally, when I am okay with my relationship with myself then I deal alot better with others. I am also available to be friends.
Unfortunately this means I become better at understanding that sometimes peoples plans do not include me.
Also I have learned that I can't control people nor figure them out.....it is tough. Please remember that this dude has his whole host of own issues and maybe your not priority number 1. If your like me this is hard to accept.
C