There is some colorless liquid like semen (smells like semen too) coming out of my penis after I ejaculate. Should I be worried? There is no burning.

That is normal... What you described represents a natural course or sequence of events of orgasm/ejaculation. So, don't worry and enjoy life. But, best of all is practicing low-risk healthy lifestyle without overindulgence / obsession as the key to live a long happy life.