I've been acting like an obsessed loser for 3 weeks since my x and i broke up..is there anyhope if i stopnow?

brandon I've been acting like an obsessed loser for 3 weeks since my ex and I broke up. Is there any hope if I stopnow? We've been together for almost a year....I'm 25 with a 4 year old and she's 21 with 2 year old twins....we talked marriage less than a month ago...she left and moved in with a couple she met thru me...a guy I still work with on a daily basis....this has made it all the more complicated....I have mive depression/insecurity issuesthat I take medication for...I love her and just don't know how to proceed....I've never felt like this before...not even after my divorce 2 years ago( I blame that one on 2 tours in iraq) as far as our friends go, I'm really close with the guy and same goes for his wife and her..I know I sound like a crybaby here...and everybodys sayin the same things as far as give it time to settle....I guess what I'm really looking to find out if there is any hope after my pathetic behavior over the past 3 weeks....I know its a complete turn off but it scares the piss outta me that some smoothe talker was gonna swoop in while I wasn't there and end up doing damage that might never be fixable...blended families are hard...but our worked....it seems like the more I've tried the more hateful she's become....idk, just wonderingif from a female vantage point all hope is lost??thanks in advance