These tips will help pull you back from the brink of crazy.
Get a Friend's Take: Talk to a trusted pal about how off-the-wall you've been feeling lately, and ask her to step in if she thinks you're acting kookily out of character.
Set Limits: Feel the urge to Facebook stalk or go through his Twitter timeline? Don't. You'll feel stronger when you realise you can overcome your urges.
Create Some Space: It's hard but worth it - cutting back on time spent with your guy, especially the number of nights you sleep over together, will help you catch your breath and gain perspective and self-control.
Sweat It Out: It may sound simplistic, but physical activity will ease your anxiety. Also, mind/body workouts like tai chi help you focus on the present so you don't obsess about the future.
Seek Help: Still spiralling? Schedule a session - alone or with your guy - to see a psychologist. He or she will help you figure out if your obsession is dangerous and/or masking deeper issues.