Everyones' relationships are different. If it suits you both then thats fine - you don't need to conform to everyone elses idea of perfect love.
If you have reservations then just make sure you each have an escape route if it turns out not to work. If you need personal space then make sure that's OK by both of you and it shouldn't be a problem. Make sure the space is available.
Don't expect perfection - expect to have to work at things a bit & expect some give & take. Don't give up to easily - but be realistic if its not working.
If you wait until you're completely sure of things then you might miss out - take a bit of a gamble.
Best of luck to you both.
Kris