Will the "fabric of space time" rip from expansion? I'm quite familiar with the fabric of space time theory and as I've been quite lonely these past few weeks, I started thinking that since the universe is expanding and since the "fabric" is the universe, would our nice little sheet eventually rip and mess up space time?
There is no "fabric" to rip.

Spacetime can stretch as much as you want (and in ways you cannot visualize - hence we use mathematics).  There is no way to do anything more than distort spacetime.  It can (at least in theory) be distorted is very odd ways (odd in terms of human experience) but there is no distortion that would "rip" or "tear" it.  It is always there.

Regarding the expansion of the universe, think about it like a having two points some fixed distance apart.  As the universe expands they become further and further apart, but it's not them moving, it's the scale factor of spacetime getting larger.  The universe gets larger because the scale factor increases.  In the past it was smaller and things were closer together.

There is a theoretical idea called "The Big Rip", but basically this just says that eventually the scale factor (which in this model keeps increasing) gets so large that everything is isolated from everything else, down to the level of elementary particles.  But spacetime itself does not rip - it's still intact, it's just that the scale factor has become huge.

There are models of the expansion of the universe that say the opposite - that eventually the expansion stops and the scale factor stops increasing and starts decreasing and we end up with everything in a Big Crunch.  Again no spacetime was hurt in the making of this model. :-)