Hi Im Tyga Rahman . Im 24 Years Old And

Hi im Tyga Rahman . Im 24 years old and i have problem sex with my wife , the problem is in normal time my penis stand properly but when i want to do sex with girls it does not stand and some water comes in my penis . If stand if stand also just a few minutes only. Doctor if I like this I think my wife divorce me.But one thing last month I'm OK one night many times I make love with my wife but now automatically can't. Why please help me.
If like this I think need to suicide.
Sorry to say that.