my suggestion is to just be there. if you have told her you can’t comfort people well and then i think she would understand. my bestfriend can’t really comfort people and when i was going through a breakup the only thing i really needed was for her to be there. make her laugh and make her happy, it’ll help her a lot. right her a paragraph about how much you appreciate and love her. being with a guy is honestly terrible but being with her bestfriend will make her happy. listen to her and care for her, i hope this helps