Hi I Am Married 32 Years Old. I Have To

Hi
I am married 32 years old.
I have to babies. I lake in sex from my teen age.
I have high lobido but have very little erection at the time of inter course. I have also face a problem of thin seemen like water & have problem of premature ejaculation.
Now without use of Viagra I am not able to fulfill my partner desire.
My body feel hot maximum time but I have no problem of fever.
I spent lot of my money in different type of treatments like homeopathi allopathi herbel medicine. But I face all above mentioned problems still.
Please suggest me a proper treatment.
Thanks