Well, if you truly like her then it should be harder for you to be mean to her than it is with other people. Maybe make a habit of saying what you mean. You'll find out if she really likes you back much sooner, and she will be more likely to believe you if you ever have to lie about something important. Rise above your friend and don't talk about him unless she complains first, then it's fine to add whatever the hell you want. That's my two cents anyway. I'm pretty good at getting people to like me if I have my heart set on being with them.