How to get over someone

So I just broke up with my boyfriend because of his parents, we were of different religions and his parents told him multiple times to let go of the relationship and in the end he decided that we end the relationship because it was going nowhere especially because of the way his parents felt about our relationship. Now my main problem is getting over him, I cant seem to stop thinking about him or how he is doing. Any tips on how to get over someone, anyone, pleaseee