Welcome from New Jersey Captain.
So you've had this plant seven years and it sounds like it's been stunted beat up a bit and and wasn't especially vigorous in a small pot due to circumstances...... give it as big a container as you can manage...... as much light and heat as you can possibly provide and give it some sort of fertilizer ...
properly applied..... I emphasize that because it's just human nature to over compensate at times and an overdose of fertilization would be counterproductive. In any case.. try that and I bet you have some positive results to report soon. Good luck.