Was going good...ex bf stepped in?

Long story short...i found out saturday night that debbie did in fact like me..a lot it seemed...we went back to a friends saturday night and messed around a little and fell asleep in eachothers arms..sunday we layed in bed and watched a movie and messed around a bit more...today everything seemed alright and i was going to ask her out, but then her ex called and said he still loved her and she was crying half the night and after they left i called her and asked her what was going on and she said that she still had feelings for him and that if she did anything with anyone else he would dump her and she didnt want that to happen. Normaly I would have blown it off but i really like this girl a lot. Is there anything i can realisticly do to get her back, or at least have a chance in the future?