if you aren't levelling up any more then you need to craft higher level things.
Visit your craft trainer for new recipes, the most expensive ones are the higher level ones.
When looking in your crafting window, use the drop down menu to arrange by level - this helps
and as someone has mentioned, there is a coloured circle next to the pattern in your crafting window - grey = no xp, green = 1, yellow, then orange is the most (not sure how many points for each)