I agree with you SLE would be the best option.
Although the two of you have been enmeshed in each others life for years, you cannot draw your identity from him, nor can he from you.
Yes, you do have alot of decisions to make, sit back, take your time, watch his actions, forget his words.
There are no guarantees in life, all we can do is take all the information we have gathered and make our decisions based on that information.