Old English freo "free, exempt from, not in bondage
The primary sense seems to have been "beloved, friend, to love;
cf. Old Frisian fri, Old Saxon and Old High German vri, German frei, Dutch vrij, Gothic freis "free"), from PIE *prijos "dear, beloved," from root *pri- "to love".
Words that have lost their meaning often leave clues in their roots.
Loving is leaving free it seems to me. Frei,Ja?
Free includes debt-free!