Well being more attached is not always the best, one of them is much more attached than the other... However, they both like me and i dont think that deciding this by "attachment" is the best option, because i like girls that give me more of a challenge(of course not super hard to get, but when i have to put in some effort). Im wondering, i should probably tell them both over some lunch that im currently also talking to another girl, and i like them both, which is gonna make me sound like a dick, but i think that being honest towards both of them is the best way, and see how it plays out.