Depending on how heavy your trailer is, a gooseneck adapter/bed hitch might work.
Secondly, you may have an adjustment on the trailer suspension to raise it, or you could place the axle UNDER the springs instead of over (called flipping the axles) to raise the trailer.
Hitch model, brand/year of truck?
If you modify the neck (pin box) be sure it is done by a competent welder, or you might look at Morryde for a new pin box.
Lots of options to think about.
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired