I agree with your point that a spirit from God, made in his likeness, is necessary to love. We all have a spark of God's spirit in our heart, so we are all capable of loving whenever we point our will in that direction.

Angels aren't material and never will be

Angels can take on human form and at any time revert back to being invisible. You may have seen angels and assumed they were humans. When you meet strangers, be kind to them, because you never know when you are actually doing a good deed to an angel.

Hebrews 13:2

“Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.”

Also, angels must become human and walk on this earth, as the Lord himself did, if they want to become children of God.