A small patch on my hair was ripped out by glue and now I have a bald spot; will it grow back?

There is a good chance it will grow back. Of course, I can't say for sure because I don't have your photos in front of me, and I don't know your whole story and I don't know the health of your hair and scalp before this happened.In general, if the trauma was minimal, there is a pretty good chance. If you had a weave for a while and then took if off and the glue pulled off hair - that's a whole different story (as microinflammation may have been accumulating for a longer time). As you can see there are a few factors here that we must consider.All in all, please see a hair specialist. 

if the follicles were pulled out along with the hair shaft then it will not grow back but if the hair follicles did not come out then it will grow back.