Ectomorph - An individual having a lean, slightly muscular body build in which tissues derived from the embryonic ectoderm predominate
Mesomorph - An individual with a robust, muscular body build caused by the predominance of structures developed from the embryonic mesodermal layer.
I'm certainly not predominantly mesomorphic in any way much less a guy who gained weight from 115 pounds? Its not a put down but wake up here bro. I am only an inch taller and would have to eat almost nothing to get under 210-215 pounds. As long as you continue to gain 'good' weight keep eating how you are.