It is very unlikely that one would suddenly start reducing weight if you skip your meals sometimes. I would rather suggest you to look into the details and get yourself tested. Along with that make sure that you consume good amount of food during your breakfast, lunch and dinner.
Next Steps
Plan your day well in advance so as to avoid any last moment preparations for your meals. keep healthy snacks handy to avoid long gaps between the meals
Health Tips
If there is any drastic weight loss in few months pls contact doctor to find out the root cause of the problem. If you need further clarity you can contact me .