Thanks for your post. This is the only one of yours that I've read so I'm not getting a full insight like Croix is.
These are all big decisions. I'm not really sure which one is the best option, because they all have pros and cons. I'll try and share some of my thoughts and maybe that will help you decide -
rent with a friend
pros: you get to see your friend
pros: you save money
pros: you're not locked in (like you would be with a house deposit)
cons: if you clash or have a fight with your friend it's super difficult
cons: if you or your friend wants to buy a house/move out it's tricky too
go into a share house
pros: you can save lots of money. Share houses are often cheaper than renting with friends too.
pros: you're not locked in (like you would be in a house deposit)
pros: you always have people to interact with and can make lots of friends/socialise a lot.
cons: there's always people around so you don't get much of your alone time
cons: dealing with stuff like groceries/bills with multiple people can get exhausting
deposit on a house
pros: it's long term so you don't need to worry about other people breaking a rent contract or having to move out
pros: you get your own space
pros: your money is going on an investment, and you get to decide where your money goes
cons: it's long term so you're kind of stuck for a while if you change your mind
cons: it's very expensive
cons: if you're not renting out other rooms you won't get the chance to be as social
I'm not sure if any of this helps?! Maybe your therapist might be able to offer some extra ideas or support.