It's not the physical aspect of the girl that matters, if he sacrificed his life for that girl... then maybe he truly loved her but then again he should have left a little love for himself. Committing suicide is not the answer to this!
Move on if someone you love doesn't love you back! Accept the fact the in life, you can't please everyone. Go back to where you belong, to your family... talk to them, everything that's happening in your life because at the end of the day, they will still understand you no matter what.