Dave,
You say you have been married just over 1 year and that you have no kids. Also you both have full time jobs.
I am going to focus purely on the financial aspect, not on the relationship side and whether or not you should save your marriage or divorce.
Because of the short marriage, no kids and both working. The likely outcome of divorce at this stage is that you will both be put back into the position you were in before you married.
So what was yours before you married - you keep.
Any increase in value of assets (e.g. house price gains) over the last 12 months is something she could potentially claim a 50% share of.
Be aware that if you have a kid then things change significantly and you will be liable for
child maintenance til kid is 19 - so think seriously about having a kid if you are not completely sure about long term commitment to the marriage.
The debts are likely to be viewed as joint if tehy were incurred in the last 12 months (whoever by) unless they were incurred on extremely excessive spending - e.g. gambling or similar.
Who has paid what during marriage doesn't matter at all really.
What matters is that you both have jobs and so she can support herself without ongoing maintenance payments from you.
If your job is much higher paying than yours and marriage was longer (say 3,4,5 or more years) then
you can start to be liable for spousal maintenance -i.e. ongoing payments to her to make up for difference in earnings.
So summary is in short term - if you divorce soon you should come out OK financially. If you stay married, have a kid or two, and divorce in 5 years time then you will lose a big percentage of your assets and/or be liable for ongoing child maintenace / spousal maintenance payments.