Hi Mari,
Is your boyfriend in college right now? If not, he should choose an undergraduate program at the same school as the vet school he wants to attend, it usually helps with admission. Not many vet schools have a large reptile section, he may have to settle with a nice exotics program. If he wants to be a vet at a zoo lthe exotic concentration will help because many programs want a vet that can treat a variety of animals. If he wants to specialize in herps he may want to attend graduate school and get his Master's before or after vet school, this can make him appealing to potential employers. Louisiana State University vet school has a very good wildlife program, but they are geared towaard raptors (birds of prey). If you find a school that has a good herp program let me know! Good luck! 
Laura