Will's monologue & how Mike and Will fit each other's emotional needs
One thing I love so much about Mike and Will's relationship is the way the complement each other so well. They fit each other so well, they just work. Without having to talk much or alter themselves at all. One big aspect I see is this:
Mike is a leader, his love language is protection, he wants his loved ones to need him and look to him for help.
Will continuously meets all of these things.
All of those aspects of Mike that he has shown to want and need in a relationship. Example: (about El) "she doesn't need me anymore" (distressed).
Mike and Eleven through the seasons
Initially, El did meet these criteria. She did want to be in a space where Mike led her (and whoever else), she did want Mike to protect her, she did need him - except, not in a good way. El's identity is very fragile and she's incredibly anxious when we first meet her in s1. When she finds that Mike treats her well, and she's safe with him, she latches onto him. She never wants to let go. She attaches anxiously to him, relying on him for her sense of self, safety and worth.
So initially, she did fit Mike's emotional wants as a partner (though not coming from a healthy place). In s4, we see her grow out of this. She discovers and understands that she doesn't need Mike, she is not a monster and she's strong regardless of Mike.
She's now leaning towards being independent, both in her sense of self and in her actions and words.
Mike doesn't match this. There's nothing wrong with them not fitting each other in terms of emotional needs/wants and love languages, But they simply do not fit.
Will's monologue as the opposite of Mike and El's relationship
Will's monologue to Mike about El him (we know he was actually talking about himself) needing Mike, on the other hand, was exactly what Mike would've wanted from El. Which is exactly why he can even manage to get the love confession out later in the first place! (Wait till he finds out that the feelings he was able to respond romantically to were actually coming from a boy, his best friend)
It reassured him. Will simply spoke about his own feelings towards Mike, and they fit Mike's emotional wants and needs from a romantic partner like a glove.
1. "She doesn't need me anymore"
"But... What if... After all this... She doesn't need me anymore"
"She's already beginning to understand she doesn't need me, I saw it - I saw it in her eyes"
2. Leadership and protection
"The point is - see how you're leading here? You're guiding the party. Inspiring us. That's - that's what you do. And your coat of arms here - it's a heart. I know it's sort of on the nose but - that's what holds the whole party together. Heart. Because see, without heart, we'd fall apart. Even El me. Especially El me.
These past months, she's I've been... Lost without you. She's I'm so different from other people and... It's really scary to be different.
When you're different... Sometimes you feel like... A mistake.
But... you make her me feel like... She's I'm not a mistake at all - like she's I'm better for being different. And that gives her me the courage to fight on."
He's saying, "you lead me, you inspire me. This is what you do. This is who you are and I love it, I want you this way."
"i'm lost without you, you make me feel better for being different, you give me courage" - this is all a way Mike protects Will.
Plus, of course, Mike literally visually being at the front of the group in the painting - the image in Will's head of Mike protecting him, quite literally. And he's fighting beside him, because Mike gives him the courage to do so.
Of course, it goes without saying how Mike meets will's needs perfectly, too. It's the same thing, but reversed.
Will wants to be protected, he wants someone to lead beside him and to give him courage, he needs his partner.
Of course, none of this is an unhealthy kind of needing or wanting to be needed. It's not about emotional dependency. This is just a show of their love languages, both on the giving and receiving end. Mike has a certain love language he wants to convey to his romantic partner, and Will has a certain love language he wants his romantic partner to convey to him. And the two align perfectly, they are the same love language.
Whew. That was long. I just love the way their personalities fit each other like puzzle pieces, it already seems and looks so comfortable, so cozy, and we haven't even gotten to see it yet. "It" being Mike and Will in a romantic relationship. Not that they didn't have this dynamic before as well, but this will be a romantic relationship.
I also have more thoughts about this but they're more fanfic-y, spicy thoughts, even, lol. So I'll end it here and you can find those on my blog (hopefully).