Are there any Hotels in Boston that will book an 18 year old?

Planning a trip and I'm not sure...

I have never been asked my age when I have booked a room anywhere....If you have a major credit card you shouldn't have any problems.

As long as you aren't asked your age you will be OK. However, if they do check your ID the chances are very good that you will be refused a room. They can legally deny lodging to anyone under 21. As first poster suggested - just have a major credit card and hope they don't ask for your DL.
Good luck.

I suggest you call and ask. If you are planning to travel during prom time or spring break it will be very hard because during that time most hotels enforce some type of ID checking and/or age requirement.
If it is possible, try to sign up for the hotel's rewards/frequent guest membership. This will show that you have some type of relation with the Hotel and you will be less likely to be turned down.
Good luck