this poem is very strong and powerful and has the aura of self awareness
some things you can do to improve it are encorporating all the senses (i.e., how does it feel, what does it smell like, what sounds are heard, texture, sight, et ceters)...also, show don't tell. Your words are really lyric but we are missing actual events and images of the events; we are only given the result. Although that mysterious vibe is good, there is room to add more description to the poem.
As I begin reading, I sense a forceful writing. As though you are forcing yourself to write again after a lack of inspiration. As opposed to other poems, I felt a fake sense of emotion. Though emotion is a key element in poetry, emotion without the mind is dead like the body without the soul is dead. I love the cliché sense of I'm happy but I'm sad. Love the optimism on the last line. Flow is broken off several times during the poem. Remember that no poet ever reaches a stage in life where there is no stage higher than where they are. A poet is a humble servant to his words.