My longtime friend's brother committed suicide I just found out what should I do, haven't seen her in while

I would write to her and offer your condolences. Include your home phone number in case she would like to get in touch with you. Sometimes, friends grow apart for various reasons - whether it's because life gets busier, or they no longer get along as well......but still - all that aside, I would write & offer condolences at the very least. Maybe make an offer to get together & catch up wouldn't hurt either.

Good luck.

Call or write her to say you just learned of the news about Bob and how sorry you were to hear it. Mention any pleasant memories you have about Bob, or about her relationship with Bob. ("I remember how he made you laugh with his imitations of Reagan.")

If she is religious, express confirmation of her belief that he is no longer suffering but is at peace with God (or whatever her beliefs are), without saying that you believe it, too, if you don't.

Suggest a specific about getting together, if you want to renew your acquaintance. Promises about "sometime" don't seem to happen, but if you say "the week after Christmas let's go out to lunch" and then write her a note or phone to confirm plans, it's easy.

try calling the family and seeing if there is anythijng that they might need