When we said women aren't as complicated as they're made out to be, we really weren't joking around. You can literally tell if she's in love with you or not just by looking at her. Seriously, talk to her, look at her facial expressions. Make eye contact with her from across the room and really pay attention to the way she looks at you.
Does she look like she simply can't believe how lucky she is to have you? Does she look like she couldn't be happier to be exchanging a secret glance from across the room with you? If so, congratulations! We'd say she's probably head over heels in love with you. That wasn't too much detective work, was it? We told you it was going to be pretty easy to figure this one out...