The Haynaku Verse Form, was invented in the 21st Century by Eileen Tabios, and consists of a tercet of six words, with the first line containing one word, the second line has two words and the final line has three words. Rhyme, meter and syllable count are all in the discretion of the author.
'breaking free' has a double connotation here actually. It is as you said, love growing over time, but before that and this is referred to in the title, first love, so the emotions being felt for the first time, being unlocked from deep within.
A lovely piece. I adored the message. I think you may change the punctuation (:) with a hyphen (-), like what we make in haikus. Here I'd like to say, if I'm not mistaken, that not always these emotions finally break free. Some get stronger and stronger, unless you mean something else by "breaking free".
Finally, the message is so strong with few words.