These are crude numbers but homeownership is typically like this:
First few years: Home $1500/month, rent $1000/month.
After 10 years: Home $1500/month, rent $1500/month.
After 20 years: Home $1500/month, rent $2000/month.
After 30 years: Home $300/month, rent $3000/month.
It is painful at first, but don't forget the financial rewards that will be coming. And that doesn't even count the principal that is adding up giving you a sizable savings account.
One thing I think should also be pointed out is that the "cost" of renting goes well beyond the rent that is paid to the owner. Asa renter, you forego the extra income that you would be able to take home by deducting the real estate taxes and interest accrued on a mortgage if you owned a home.
E.g., Say you rent a 2 BR apartment for $800 a month. You could buy a similar place for $240k. You can put 20% down, and will have to finance the remaining $200k at a rate of 5% interest. Taxes on the property are $4k per year, and you are in the 25% tax bracket.
In the first year of your mortgage, you would pay roughly $10k in interest, and $4k in taxes. As a result, you can deduct $14k from your federal taxible income. Taking into account your 25% tax bracket status, you could take home an additional 3500/year, which comes to ~291.00 per month (assuming you manipulate your w-4 appropriately).
Thus, your true cost to rent is 1091.00 per month, i.e., the amount of your rent, plus the amount you forego by renting instead of buying the $240k apartment.
In contrast, the monthly PITI payment on $200k at 5% interest for 30 years is ~1132.00 (1172 PIT + $60/mo for insurance). That means that it costs you a whopping $41 a month more to own, than it does to rent.
But even that doesn't paint the whole picture. As some have mentioned already, ownership has one major benefit that renting doesn't, and that is the accrual of equity in the home. In the initial years, each payment on that 200k loan nets the owner ~$250 in principal. Thus, for that extra $41 a month, the owner gets to keep an addition $209 of his hard earned money, albeit in the form of home equity, and not liquid cash.
In our particular scenario, the difference between our PITI payment and our true cost to rent is ~$250. But each payment nets us ~$420 in principal. And the home we are buying is ~10000% nicer than the craphole we currently rent.