What does 'plus one' mean in this context

[hourglasses]

Met a man online. He said from the outset that he cannot commit to a full relationship for many valid and truthful reasons and neither can I , but he said he would like a plus one type arrangement . Is it unreasonable for me to think that he means more than a fwb but less than a fully
Committed relationship.
Our contact and connection has intensified over the last few months , to daily chats for hours and video calls. We speak and plan about meeting up all the time, after lockdown . What do you think? Thank you.

Widow here
The thought of dating again after what I went through was extremely daunting. For a very long time I said never again.
Tried OLD. Met up with someone after chatting for a good while explaining how it might not be for me because I was scared of starting again
We're now married

@Sally872 ah thanks that makes sense! I thought PPs meant the whole profile was completely fake, as in no one there looking to date at all but a scam for bank details or something.

@Newkitchen123 that’s a lovely happy ending!

Such a lovely story ! Congratulations.
He is still sad and nostalgic of course but admitted that love had died between them many years ago but that guilt and remorse remained .
I expect that when you become a widow or widower , part of you will always carry the deceased spouse in your heart but knowing
That life moves on too.

@Stannisbaratheonsboxofmatches
Thank you
It was worth taking a chance
I think the OP should just give it a go