Darko - Your attitude is half way there! But 15kgs in a month isn't good! You should be focusing on body composition rather than actual weight!
I know I'm no pinnicle of health, but I am a qualified coach and have spend my fair time studying the bodies reactions to different food to develop power, peak weights and general overall health etc... aswell as putting this into practice.
Your body will be drawing on the wrong type of energy.. you should be seeking muscle gain aswell as fat loss and restricting the eating isn't a way to get it in my opinion! IF you continue doing this, what Matboy said about not having the energy to impress those ladies of yours won't be just a smart ass comment!
Eat lots of food, of the good kinda, snack lots (on the good shit!)...boost the metabolism with high nutrient foods and keep up the running! You should be maximising the energy burning process with these foods, restricting the intake will just retard (haha i said retard) the process.
Don't forget to invest in good running shoes if you are doing an hour a night. I can't stress the importants of this! I have stress fractures in my shins from too much running and bad shoes. One day you'll wake up and go.. shit my legs hurt and you'll have shin splints just like that!
On that note, I'm going to the pub to drink lunch.
Coach Liz.