Is law school a good investment?

History major from top undergrad with no other real career prospects (my own fault, really). 1 year experience assisting attorneys in a law firm. Have sizable undergrad debt. GPA is too low to get into top 14 law school. However I do love the law, the practice of law, and could absolutely see myself practicing law for the rest of my life; at this point I’m very concerned I would be taking on more debt than I could reasonably repay. However I have no idea what else I would do.