Been reading other peoples' post and lot of sense in them however we can talk and show how much we know about relationships at the end of the day the person with the problem knows it better than anyone one of us. With that being said I think out of all that have been said Kilo cake must be able to make up his mind using all the diverse information from useful co-members of the forum.
One thing I would like to say is that It is easy to walk away but hard to make something work, I do not consider asking your partner to join you in outdoors activities needy or pointless, It is better to try all you can if ones heart still desires to make means of bringing healthy change in a relationship. At the same time if the partner does not show any interest in anything suggested I would easily believe she does not care. Relationships is about many things one of them is to compromise at times.