<p>Since you have a full ride, you must have gotten into or have the stats for COmmonwealth Honors college: do apply.
BTW look into the full ride (“full ride” means the scholarship covers tuition, fees, room, and board, and sometimes provides a stipend for books) since last year there were bad surprises due to the fee structure at Umass.
In addition, you can still apply to many other schools. You have till May 1 to decide where you’re going to go: why not apply to 2-3 schools that are more similar to Holy Cross than UMass? if you’re nervous, deposit at Umass and the Honors College, this way you’re sure to have a place reserved. As someone said, go visit. Here on CC there’s a whole discussion about Commonwealth College (“game changer for Umass?”) and a specialized forum. Log onto the accepted students’ facebook, etc.</p>