My kid and his girlfriend are serious and go to different schools. It works if you concentrate on your education and see each other once a month or so. Scripps is an all women's college so you should not have too much competition.
Go to the school that makes most sense for your future profession. Weigh the relationship carefully. If she is really "the one" and you can't be separated then go to Pomona. Just remember that you will still be on different campuses in different cities (much closer than Davis of course). You may see each other less than you think unless you live together off campus and you both commute. How much debt is she taking on? Scripps is a very expensive LAC. If you are truly planning to get married someday, remember that her debt will become yours too. So, collectively, try to keep the debt down.