Roommates: How much information is too much?

When you and your roommate are in the pool of dating, how much do you talk about your love life to them?  How much is too much?

I have this dilemma currently.  I have a roommate I enjoy having around, we go to dinner together, hang out with her guests together, craft together, watch Harry Potter and Christmas Movies together.  We enjoy each other's company, but we're also both single and in the same dating pool.

How much do you share about your happiness when your roommate isn't having such luck?

My theory:  Don't share too much, you don't want to make them feel bad.  I don't like rubbing salt in the wound of loneliness.  Misery loves company, and joy isn't welcome.  I have been severely quiet about my relationship with her because I don't want to build resentment.  I have kept all our mementos in my room, and pictures to a minimum.  Anything related to our relationship has either been stored in my craft closet, my room or his place. 

She's asked me a couple of times how things are going, and she knows that we have alternating weekends due to the semi-long distance (he lives about 40 minutes away).  But I haven't told her my plans or anything like that because I really don't want to either build resentment or to overshare and then feel the need to extend my relationship with her beyond roommate life.  (long story, but if a wedding is involved there might be a need to add her to the list?... just saying).  I've heard her comments about a recent wedding she went to, and it wasn't uplifting.

So, in an effort not to rub it in, and to be as polite as possible about her situation, I don't share things with her.  I do the single life with her on the weekends- mad dashes for food, night runs to the grocery store, and then go about my quiet little life on the weekends with my boyfriend.

I see no reason to make my life more difficult in attempting to soothe her situation, and try and help when I know I may never get there with helping her.  I just am there if something goes wrong and we need a chips, salsa and enchilada run.