I think it is not very much important. The important thing is that your partner should know about you and your liking or disliking, your level of understanding .If you have engaged to someone then you can judge yourself whether you have choose the right partner or not.

Life can exist else where in the universe,because we know that to be live any thing there should be such atmosphere or ingredent needed for life if some where except earth these are all available then the life can also be available there.