Sex and Relationships

Hey guys, hope you are having a better day than I am.
My day has been good so far but i just looked out my window and it is SNOWING...
And i have to be at work in a couple of hours
The thing i hate most about the snow is when i have to go brush snow off my car...I hate it
I see some people cleaning their car and making sure that there is absolutely no snow on their car
Me I don't have that kind of patience...I just make sure all the glass is fine so that i can see and Im out
I do not like snow, which is why i keep asking myself why i came to school here
But its all good because I will soon be done..

Anywayz, I have a question'
Me and one of my friends were talking about relationships and stuff like that
And the issue of sex came up
According to him, you can't be in a relationship without sex involved
I beg to differ but maybe that's just me..
So guys, how important is sex in a meaningful relationship? (and notice i said meaningful)
Do you think it can survive without sex??

I want to know what you guys think.......