I feel really very much alone. have u ever felt the same whay?

N I got that feeling that nobody(especially boys) like me I feel like I will not be able to find a lover or have a bf. I feel ugly cause during my college applications I gained 18 kgs. What should I do? when I share this w my friends they keep on shouting at me n tellin me to stop being redicilous,* what do u think? Plssss help me