मैले माया गर्न जानिन होला = may be i didn't know how to love you.( It's very hard to translate excat, ecurate in english) or, the way i loved you, it wasn't the way you were expecting. गर्न = to do. गर्नु = have to do. (both have almost same meaning.) मैले = i माया गर्न = to love जानिन = not to know होला = may be( he was not sure he is questing to himself) past form = may be i was lacking to love her or maybe i dind't know how to love.

garna give u option while garnu is particular with things.. like for example if i ask u timi ley tiyo kaam garna sikhau... here garna give u option .. like did u learn to do this work? timi ley tiyo kaam garnu parcha... here garnu mean .. u hav to finished the work given