Welcome to the WL&D Community and thank you for being so honest and forthright in your post. We are all here to sharing the same journey and sharing the path to a successful lifestyle change.
In using the information you provided, (34, 260, 5'11") and ??guessing?? you are female (numbers would change if you are male), here are the calories needed to MAINTAIN your weight.
1950 Inactive
2150 Somewhat Active (2-3 x a week exercise for 30 min)
2350 Active (Working out most days of the week for at least 30 min)
2750 Very Active
Here's a few things I see that may be stalling your progress.
Calories should be spread somewhat throughout the day, meaning 3 meals and 3 small snacks. This keeps your energy level up, keeps your metabolism going, your blood sugars more even and does not cause confusion to your body thinking it may be starving.
Next, it takes a calorie deficit of 3,500 to lose 1 pound. This can be done by cutting down your calories or increasing/changing the exercises and their level or intensity. Our bodies are remarkable creatures and they adapt easily to the same exercises day after day. Change it up and make it fun ... cardio, weights, walking, stretching, basketball, volleyball, bicycle, swimming, hoola hoop, dancing, tennis, pilates, yoga .. keep trying new things and do not get into a routine of the same exercises.
As for the coffee .. most of us drink coffee (me too) .. but it does not count as water to our bodies. Drink water! The alcohol (which can be used in moderation) are empty calories that make it very difficult to lose weight if you are doing so on a weekend basis. Here are some facts ...
Alcoholic beverage, distilled, all (gin, rum, vodka, whiskey) 94 proof - 1 fl oz (not much) is 76.45 calories.
Carbohydrates are okay but I suggest keeping them to a minimum. And, when you do eat them, eat complex carbohydrates (wheat, rye or multigrain bread (1 slice), wheat pasta) or try using spaghetti squash instead of spaghetti. Your banana is good before you work out .. you may want to try an apple as it has fiber that has some staying power.
http://www.medhelp.org/posts/Weight-Loss--Dieting/Plateaus---Physical-and-Emotional/show/1042073 - Here's a group conversation on plateaus we have shared before that may shed some light and let you know you're not alone.
http://www.medhelp.org/user_journals/show/40803 - This is a journal article regarding plateaus that I think you may find helpful.
Finally, and most importantly, please implement the Food Diary and write down everything you eat (snacks, nibbles, everything) as this gives us a clear picture of the true number of calories we are consuming. Also, the weight tracker, mood tracker and exercise tracker are key tools in our journey. With information from all 4 of those, I and other community members can help you see what is going on and provide you with definitive answers to help.
I started out at 330 lbs and am down to 197 ... one day at a time ... and I lost more weight earlier on because there was more excess to lose. I am 54, female and 5'6" and not as active as I should be (am working towards correcting that). I keep my calories between 1,200 -1,400.
Hope you will join us on a regular basis and let us know how you are doing. We believe in you and know you can achieve your goals! ;)