Please help solve an argument

Hello,

My self and a friend disagree about a probability question.

He thinks that if a truly random dice is thrown an infinite number of times, it

is still possible to never throw a 6. No single throw guarantees a 6, so an

infinite number of single throws does not garuentee a six.

I, however, an inclined to disagree. I suspect that the 1/6 probability of

throwing a 6 on a truly random dice becomes not a probability, but a

necessary ratio when the dice is thrown an infinite number of times.

Neither of us are mathematicians and we are both humble in our hunches.

Can anyone tell me who is right and show the reason/proof that each

person is right/wrong? I would be very grateful.

ed: Please only answer in very simple maths or, even batter, words if

this is possible as neither of us are mathematicians at all.

I apologize if I have the wrong forum or have made some other mistake.

Thankyou