I really liked the reading of this poem so I wanted to take a shot. This is a partial answer.

I believe the subject is

Some form of the birth/death/time cycle

Though a different shape, my form I take From that which bends but does not break.

LIGHT bends but does not break, and in this case, the form is SUNLIGHT

Two in love, or simply lust, Doing as they feel they must.

MATING is the obvious choice here

The rhythm of a heart that beats, The changing patterns of one's feet.

DANCING

A helping hand, a bandaged knee, A slow but sure recovery.

FALL, which is also a season

No clouds in sight, a gorgeous day! A flower always bright and gay.

This describes a typical SUMMER day

From trees that never lose their leaves To dusty pollen on the breeze.

WINTER has evergreen trees

I weave a spell with just my words Hoping that I may be heard.

This seems a bit forced, but ROBINS are said to announce spring

The sound of water's like a balm, A flowing sense of peace and calm.

And this describes a SPRING

What makes you, you? What makes me, me? The thing we are, but cannot see.

No clue

I have changed throughout the years. I have seen my share of tears. But I still shine on, you see, Tell me now, who might I be?

The SUN shines on... but I'm not convinced this is the answer even though it is a bookend with the first clue.

So finally

The clues all seem to involve birth, life, change, and time passing, but I am unable to link them.

I really liked the reading of this poem so I wanted to take a shot. This is a partial answer.

I believe the subject is

Some form of the birth/death/time cycle

Though a different shape, my form I take From that which bends but does not break.

LIGHT bends but does not break, and in this case, the form is SUNLIGHT

Two in love, or simply lust, Doing as they feel they must.

MATING is the obvious choice here

The rhythm of a heart that beats, The changing patterns of one's feet.

DANCING / LIVING

A helping hand, a bandaged knee, A slow but sure recovery.

FALL, which is also a season

No clouds in sight, a gorgeous day! A flower always bright and gay.

This describes a typical SUMMER day

From trees that never lose their leaves To dusty pollen on the breeze.

Describing the transition from WINTER to SPRING or GREEN/NATURE?

I weave a spell with just my words Hoping that I may be heard.

This seems a bit forced, but ROBINS are said to announce Spring

The sound of water's like a balm, A flowing sense of peace and calm.

And this describes a SPRING

What makes you, you? What makes me, me? The thing we are, but cannot see.

ATOMS / CELLS

I have changed throughout the years. I have seen my share of tears. But I still shine on, you see, Tell me now, who might I be?

The SUN shines on... but I'm not convinced this is the answer even though it is a bookend with the first clue.

So finally

Take all of the clues... put them together? LIGHT, SPRING, CELLS, GREEN, LIFE, REPRODUCTION, FALL... Almost sounds like a recipe for DIY solar power or something, but that might be stretching the connections.