best hotel for romance in Boston MA?

XV Hotel
or
Nine Zero

The Four Seasons...Get a room with a view of the park, preferably a balcony.

They have a 'Romantic Getaway Package'
Whisk yourselves away for a night out (or a night in) in Boston with an overnight package designed to bring out the romantic in even the most bashful couple. You'll stay in one of Four Seasons Hotel Boston's brand new guest rooms or suites.
Includes:
* Luxurious accommodations for up to two persons
* Champagne and mignardise treats on arrival for up to two persons
* Four Seasons breakfast for up to two persons through In-Room Dining
* Valet parking for one vehicle
* All applicable taxes and gratuities