when youre super busy and your coworker asks for help

[Warning! - Sob story ahead, you've been warned]

Dear devRant,
today someone who interviewed me in the last days, said they want to hire me.
Good news, right?
Professionally speaking yes, but... i don't know.

I always been a freelance: never had much work, but i was always free of doing whatever i liked and whenever (no fixed working hours).
I have a room in an office with 2 other people. People i love to hate (it's complicated).

But now i'm thinking about this new work they are offering me: no more freelance, no office, no flexibility. All with a 6 months contract.
What really scares me is that i will lose what i have... even the 2 co-workers that i hate/love: i have never been able to make friends, they are the thing that comes closer to friends in my life.

I'm feeling a void in front of me:
being an adult (35 years old...) and choose a work that pays, but loose... essentially what i am, what i have hardly build...
OR decline the job, and going on "Peter-Pan-style", living at my pace: free but constantly hoping of something good to happen to me

I don't know, really don't know... so many feeling are overwhelming me now.
And tomorrow i have to make a decision

My team is forcing pair programming. From past experience, it's never worked for me, it slows down my work by 10x because of my sporadic programming style.

Seniors and Architects, what are your thoughts? I've seen it do wonders for novice devs, but the return seems to decline with experience.