As long as you have an insurable interest you can buy a life insurance policy on another person.  That interest need only be present at the time you purchase the life insurance policy.  If that interest ceases you can still own the life insurance policy on the other person's life. 

In addition, you may need the person you want to insure to sign the application for life insurance and answer some health questions.

There are many scenarios where this is practiced and generally is based on a dependence on the economic value of the other person (boyfriend).

For instance, maybe your boyfriend is the father of your child, you are pregnant with his child, or he supports you financially. If you rely on your boyfriend for some means of financial support, or you would suffer financially if he were to die, then you may be able to purchase life insurance on your boyfriend.

Here's how you may be able to buy life insurance today on your boyfriend.