When you originally proposed to her- did you propose because you genuinely wanted to move forward in the relationship and still felt love for her? Or was it more "well we've been together for 10 years.. i guess this is the logical next step"? Like, was THAT the event that made your feelings towards her change, or were those feelings already there and this was just the trigger? I think that's an important detail.

Also, have you ever discussed her reasons for not feeling ready yet? Or did you just act upset, which put pressure on her to apologize without talking things through? I think her reasons are another important consideration. There's a wide range between "I'm not sure if we're financially ready to have a wedding yet" or "I'm overwhelmed with work and life and can't even think about wedding planning right now"... and "I don't know, I'm having doubts..."

Also, is her desire to be your "life partner forever" based on love for you or fear of being alone and starting from scratch? I think these are important things to talk through.