<human>: Could you distill the essence of the text into 1-3 sentences?

Bit of background for you. My girlfriend of just over a year and a half has been feeling depressed recently over her lack of a social life. She didn't make a lot of acquaintances when she was away at college (before I knew her) but had a close knit circle of friends with whom she is no longer in contact (I don't know why). She sees a few close friends from high school periodically but they're either very flaky (making plans, then cancelling time and again) or wrapped up in their relationships.

I have a few hobbies which afford me good friends outside of work (I play in two musical groups and also play soccer) but, aside from me, my girlfriend really doesn't have anyone to talk or meet up with on a regular basis. When I have plans I try to include her as much as possible but she's pretty shy and feels left out because of the common connections that my groups of friends share (music etc.). 

In the past month she has been feeling sad about not being able to rely on anyone other than me (her words) but is very shy and lacks self-confidence when meeting new people. How should I best tactfully suggest ways she can expand her social circle and meet people with whom she shares common interests without a) seeming arrogant in trying to 'fix' her and b) damaging her self-confidence any more?
<bot>: How do I go about suggesting ways for my girlfriend to find new friends without appearing overbearing? We're both 25 and live in NYC.