so... you're doing everything everyone's telling you but not getting what you want out of it?

Everybody depending on their body has a different metabolic rate.  As you get older, yes! losing weight gets harder. whether you're  active or not.  But EVERYONE can lose weight.

In one pound of body fat there are 3500 calories.                                                                             If you consume 3500 calories in one sitting, you have gained a pound.

When you are trying to lose weight, you MUST use more calories than you consume.                            If you exercise, this increases the amount of calories burned.

Using the Body bug, or some sort of calorie burn monitor, you can specifically see exactly what your numbers are, but if you are no interested in the technology, you can go off the aproximations on the machine but you might not be accurate, so underestimate what you've burned.

Jogging one mile is apx 100-120 calories  it's just how long it takes you that depends on your speed.

Riding the stationary bike you burn 200-300 kcal per hour... so... if you jogged a 10 min mile for an hour, you'd have burned 600+ kcal so make choices that work best for you.  You don't HAVE to workout hard, but if you go at a slower pace, make sure you include more activity.

Choose a ratio of 2:3    this is cardio vs. weight training.  It doesn't matter if you do more cardio or more weight training if your sole purpose is weight loss.  Both burn calories (legs burn the most due to their size), but combining the two contributes to ultimate health and is how your body is designed to function and stress.

Once you burn 3500 calories.... you've lost a pound.                                                                      But this takes time! set goes which are under your control.

"I will do 3 days of cardio for 1 1/2 hours and 2 days of weights and maintain 1500 cal/day"

When you accomplish this... which you CAN... reward yourself WITHOUT food. and start again for the next week with similar controllable goals.

Doing this... you will be able to keep yourself motivated.  Focus on CONTROLLABLE goals, not Outcome goals. ("2lb loss" These will come in the end, but they will not help to motivate you.  It will lead to discouragement.  Let it be the suprise at the end of the tunnel. That "OH! I did all of my goal and on top of it I lost 10 lbs"

remember an excess burn of 100 cal/day, it will take 35 days to lose a pound. So aim for 300 (11 days)-500(7 days)/day in exercise and keep nutrition at the 1200-1500 kcal/day will increase that deficit and you'll be reaching your goals in no time.