Dave the Gnome, you need to relax, mate. No-one is out to get you and you don't need a gun.

I see this as the flaw in your logic:

Someone might try and intrude in your house. Alarms, locks, police etc will make this very unlikely, but OK, they just might.

IF they get in there is the possibility (no more than that)they might be prepared to injure you or kill you. You have the right to prevent this, and the best thing for this is a gun.

Thus the laws need to allow you to own a gun. (reasonable summary so far?)

The problem is that the laws that will allow you to own a gun will neccessarily allow others to own guns. Some of these will kill themselves or others by accident with these guns. Others will have their children kill themselves or others by accident with guns. Others will kill burglars who don't really need killing with their guns. Others will find guns make it too easy to comitt siucide in a moment of despair. Some will pop off their wives with their guns. A very small number will find a gun allows them to kill a very large number of others with their guns.

In other words to allow you a (possibly illusional) feeling of safety a state of affairs needs to occur which will lead to a lot more people being in danger than before.