Crunch time!

Okay so I'm not necessarily talking about real crunches (though they probably should be invlolved)... I'm getting married this summer, and I haven't been taking my weight loss journey as seriously as I should have, and now it is "crunch" time. I would like to lose 50 lbs by the end of August, and since I'm currently over the dreaded 300... that won't be that hard to do. It always comes off fast at first. But I have to get super serious, and not have a lot of "cheat days". It's hard because all my friends make delicious sweet treats and we like to drink alcohol... I know it comes down to me and my willpower, but I could definitely use some motivation and encouragement.