Dry humping with bf, no ejaculation occurred. i wore thin undies, he had boxers. a day b4 ovulation. are we safe, possibly pregnant?

In real life...: Sperm do not swim through clothing in real life, so keeping the clothes on is good contraception. Wearing jeans with a tight button fly, that are really tough to unbutton, and a tight waist to stop hands from slipping through, is good contraception. Of course, a sure way to prevent pregnancy is to never be alone with said boyfriend (safer to be in a cafe, a library, among friends or family).

Highly unlikely: From your description, it sounds highly unlikely that you would become pregnant. You may want to consider some form of contraception, especially if your activities "advance".