Simplify first. Calories in, calories out (burned). It's really pretty simple. Manage your intake and burn more than you consume. I can eat relatively healthy (but far from perfect) while exercising a lot and I can really lean up quick. But, that last 5# is the hardest to overcome, I am dealing with it now. Luckily I like to exercise- I have ran a sub 1:30 half marathon and enjoyed training for it. I also like to swim & bike. Some of my best fitness came during training periods where I would do a workout in the morning (swim or lift) and then a run in the evening. To me it really comes down to the effort you will put into your exercise- go hard!
I am not a great eater either. First, you gotta eat breakfast. It makes your meals later in the day smaller. Also, eat small snacks during the day instead of large meals. I try to eat a spinach salad with as many meals as possible- helps fill me up. And as others have said, limit processed foods.
I am 100 days out from my wedding too. Really pouring the coals to the exercise and am eating with more discipline.
Pheasant isn't bad in some dishes but it can get dry depending on prep. Marinades help with all wild game but keep them cleaner too. It all adds up. I have made lots of adjustments in diet that I never thought I would because of my fiancé. Most have been very positive.
Good luck!
