To me, the key difference is just how much you can be yourself around that person, without any feeling of self consciousness or shame. Even with very good friends, there are still things about yourself (physical or otherwise) that you don’t let them see.

Also, my wife IS my best friend.

I feel like a good SO is just a best friend with benefits.

An SO will align their goals with you. A best friend may find another goal in life and go off on their own. A friend isn’t tied to you, and you’d support them if they ‘leave’ you to seek their own fortune. A partner stays with you and you and they need to find ways to reach your goals together. There’s a stability and security to a partner that you don’t get, no matter how close your friend is.

Well basically love is a form of psychosis where someone becomes the most important thing to you and your whole reality bends around that. You feel a deep abiding satisfaction and comfort just being in their presence or hearing their voice. Your personal identity becomes secondary to your shared identity as a couple and your connection to them is a core part of your emotional state and thought process. Anything that contradicts being with or caring for them is basically impossible to even think. This can be really wonderful or really horrible depending on the circumstances.

I don’t try to fuck my friends hah. I can sit for hours with my SO and not utter a word and just do my shit. I don’t have to be on and allowed to be irritable.

I’m not sure about you, but the best partner I could ever think of is one that is also your best friend; they are easy to talk to, comfortable to be with, you can joke with them, appreciate the world with them, and generally see them as your best friend, with the layer of also feeling profound physical, emotional, and (possibly) sexual intimacy. You genuinely love each other in the most pure sense of the word and can depend on each other more certainly than anyone else, because you can share anything with them, because they are your closest friend in the world.

However, most of it depends on what you want. Simply think about what you want most in a partner, and then look for that. Are you looking for someone who is also figuring out what to do in their love life? Do you need someone to push you in a direction? You have far more agency in your choices than you think you do.

Perhaps first, you should meditate on what you are looking for before you begin seeking it.

A good friend (platonic relationship) is someone I can see every day, talk to about anything, and I want them in my life regularly. I personally cannot spend 100% all my time with someone who is just a good friend.

A romantic relationship is a good friend who I can live with and want to share a blanket and cuddle with at the end of the day. It’s someone I might want to hold hands with, kiss, or sleep with. It’s someone I want to come home to at the end of a good day to share good news, or end of a bad day to make it better.

A sexual relationship is someone I want to kiss and have sex with.

There are overlap. Romantic friends and friends with benefits are pretty common terms. Having a romantic relationship with sexual interest often ends up in bad relationships; I’ve heard this described as “feels like it should work” or “I loved them but I didn’t like them.”

It’s very exclusive and more intimate physically and emotionally than a good friend. That’s my interpretation anyway.

besides you know what). And should it be?

We’re adults here. You can say the word sex on the internet, and yes.

To me, it seems like you may not be the type of person that feels like they need intimacy. If you want it, however, then that should be ok too. That is a major difference (for many) in people who are in relationships, and people who are just good friends. It’s not the sole defining characteristic, no, but a big one none-the-less.

…they just want a one particular friend with benefits

Why can’t it be both though? I think there’s nothing wrong with that, in my mind. I suppose a big consideration would be if you live together or not, or want to/plan to.

Another thing to consider is that SO relationships are typically seen as more static/permanent while good friends are considered more dynamic/fleeting.

In my experience, relationships (all relationships) are more dynamic than static. Realities of our mortality.

You can bone them regularly without making things awkward

I think for me, relationships are having a good friend with benefits.

I’ve had a few serious relationships and at the time I’ve felt like they’re the person I want to do things with, not ‘things’, just things.