Connection closed means somebody is listening to the port and failing/not willing to reply.
Unless some network middlemen is closing your connection (ssh should be on port > 1024 to be safe from ISP throttling), your ssh server is severely strained (oom, disk full...) or your F2B is kicking in.
Do not marry the first girl you fuck (or the first boy, either way, mixed ways too, anytype anyway).
Go live with him/her, share an apartment (do not buy together) for months, live together for some time.
Possibly, break up and meet more people, rinse and repeat until you understand:
And more important even, learn to understand the other person for what he/she is and not what you think he/she is.