@andoverhopeful - I am not an admissions officer, so like everyone else that posts, this is just my opinion.
I think your SSAT scores will not help you. The schools want to make sure they admit students who can be successful at their schools. At a school like Andover, the expectation is that students will be capable of handling difficult coursework right off the bat (the average SSAT score for incoming students at Andover is one of the highest of all the boarding schools - I think over 90%.) The SSAT test is one way they determine a student’s potential to be able to handle their classes. Ultimately, they want to admit students who they feel pretty strongly will not struggle academically.
Studying for the SSAT, and taking the test a few times, may definitely help you raise your score. But I think you need to talk to some adults in your life - your parents, your teachers, your school counselor - and see if they think that Andover is the right school for you. There are many, many absolutely incredible schools that do not require the academic rigor of an Andover. They are still fabulous schools, who graduate scores of prepared students that go on to do well at many great colleges. Another school may ultimately be a better fit for you.