If my boyfriend does not ejaculate into me during intercourse, can I still get chlamydia?

Yes. Throughout sexual activity there is a transfer of secretions between partners. The ejaculation may be a "final push" of material for the male, but contaminated fluids may pass long before that moment. Condoms, spermacides, lubricants or genital wash before or after intercourse may slow but not prevent transfer of this germ.