First of all, 240 lbs for 6 feet is a lot(googled it, we use metric system here). I mean it. Unless you have %10 body fat with a astounding amount of muscle, you need to lose some weight and you need to do it now. Don't fool yourself with "i'm muscular". I know it because I did that. I used to be a swimmer. Well I had a nice body and all but when I stopped swimming I gained weight. A lot of it. Yeah, I was still "muscular", I wasn't showing the weight but there it was. I'm telling you that because I've been there and I truly know how to get out of there.
But over the course of 3 months I managed to lose 18 kgs, by going to gym 6 days a week and a strong diet. By strong diet I mean 1- no fast food 2- (very) little carb 3- no garbage. That's about it. You need willpower that is true, but trust me, if you really push yourself in gym, you DON'T have to worry about your food. Because when you get back from gym sweating like a pig you'll probably say to yourself "I just did all that and I shouldn't eat like that". I've lost 2-3kg's worth of sweat every workout. Trust me after that you don't want it to go to waste.
Then I stopped going to gym, I've lost 10 more kg's over the course of a year. Last 4 months I've been going to the gym 5 times a week and now at the exact same weight I have %9 bodyfat and I have a healthy V shaped body. It feels awesome. It looks great. People you meet or you used to know always compliment you, it's a big ego booster aswell. The only downside is none of my old clothes fit anymore. I can live with that.
About pushing yourself to the gym, it's all in your head. There will be some days that you know that you should be going to the gym but you'll just wanna slack. There you'll need to man up and count that one as a responsibility. You're a man, you're dedicated and you will do it. You'll do it for yourself. Now go there and torture yourself for the greater good
The hardest thing about the whole thing IMO is sweets. I have a strong problem about em, quite sure you have too. For that, we have cereal! I'm serious. Cereal has low calorie, is sweet and has milk -which is always good for protein intake- I always eat cereal when I have the crazy urge to eat a whole bigass cake or something.