[ Hey, it was a very genuine compliment! Not even empty flattery - Madoka really thinks Raven is super sweet. Why else would she be helping Madoka so much? She just smiles at her friend in the face of that surprise. ]

See? That's why I think you'd get along so well.. You're such an understanding person. [ And Madoka thinks Mami needs that.

It's not just that she's selfishly only thinking of Mami though. Mami is politely outgoing - that should be just the right mix for her to not overwhelm Raven in turn, right? Maybe she'd be a good friend for her! ]

Ah.. S-Sorry. It must seem a little like I'm flattering you just to get you to do something for me, huh..? [ She looks a little sheepish. ] I really mean it though.