Great so far, but work on the formatting. If you want paragraphs, place a space between each one.

First of all, you really need to space out your paragraphs.

Second, I assume that you have read something about King Arthur (maybe something like "Idylls of the King" or something), so you do know that King Arthur marries and loves Guinevere (although she has an affair with Sir Lancelot) right? Of course, you can change that a bit since this is a fanfiction.

Third, you do know that Merlin is probably 60 years old (I'm being generous. He could be over a hundred, because he is a magician.) or something right? I mean that is just sick.

Neat. Please continue.