Do you have anxiety problem or have you been ill of late? Illness or anxiety could be responsible for weight loss. Don t get stressed about your looks. There are many like you who look much younger for their age and there are others who envy them for their youthfulness! So take pride in it as everyone wants to look young. Build your self-esteem more than changing your body shape or appearance. God has made each one of us unique. So learn to embrace yourself just the way you are...If you are healthy and fit and if this weight issue is not affecting your relationship with your life partner adversely, then who cares what the world has to say? Cheer up.