I'm trying to be healthy and lose a bit of weight, is green tea okay?

great, if you're trying to lose weight try it when you want to cheat, like when you want coke or sugary juices, it'll kill the appetite

the only thing that will help you loose weight is to cut down your food intake.
tea might help with keeping hunger away, but not much more.

You shouldn't be worried about little things like this when losing weight. Look on bodybuilding.com theres plenty of diet plans for all different ages and bodytypes.

It has no effect at all on weight loss. This requires diet and exercise. Taken without milk however it is basically calorie free.

Yes but tea in general will make you full, it's mostly water and the flavor comes from herbs. You can also drink flavored water, make sure it has less than 100 calories, to make you full as well.