<human>: Can you condense the text into a few key points?

So basically, I gained a lot of weight freshman year of university, decided to lose it all over the summer. I went from 220 - 190 pounds, after taking less calories, swimming daily, and doing a physically intensive job. Thats when I hit a plateau, I can't seem to go lower, no matter what I do, and my figure is mostly the same as well. I try to go to the gym as much as possible, I swim as much as possible, and eat healthy as much as possible. (although over this break, I might have indulged... and gained 3-4 pounds :( ) I am 5' 9" and 190 pounds is technically unhealthy. I am planning on starting a keto diet and seeing where that gets me... Any Suggestions/help would be awesome.
<bot>: Lost weight over summer, hit plateau at unhealthy weight, going to start the keto diet to lose more weight. 5' 9" , 190 pounds.