16 is far too young to even contemplate marriage, let alone to a man posting online and a man you don't even know.

One's online persona may not be an accurate reflection of who one is in real-life.

I would say forget this man and delete this app.

You are a teenager with a whole lot of life ahead of you. Marriage will come in time. I would focus instead on your studies, on finding yourself, discovering yourself and maybe exploring what is missing / unsatisfactory in your life that you have this rush to get married... at 16!