Resolved Question: I'm trying to lose weight, but I'm not sure if I'm in starvation mode?

I'm 5"8' and I weight 230lbs...

I eat three meals a day, each meal 4 hours apart, and keeping each meal at below 300 calories. I replace water with Oolong tea, and I drink six bottles of tea through out the day. I take vitamins in the morning and at night. I sleep for about 12 hours everyday, I get on the cardio machines in the gym 45 mins per day, six days a week, and also work out for 30 minutes three times a week. Because I'm an artist, so for the time that I'm not exercising or sleeping, I'm just sitting at my desk drawing all day.

So far I've only lost 25lbs in about a month and half, I wonder if I'm in starvation mode and that I need to eat more to really lose the weight... please help, I eat mostly grilled chicken...