Most Helpful Guy
In scenarios like this, I find the best way to look at it is from the perspective of "if the shoe was on the other foot." So, if your boyfriend gave his number to a presumably single woman who lives in your apartment building because he wanted to hang out with her, how would you feel? What would you think?
Most Helpful Girl
Be friends with whoever you want.
Just always make sure your partner isn't misconstruing the relationship and neither is the friend