sounds like you have entered the "comfort zone"........
If you are sincere about putting the spark back in the relationship my suggestion is plan to do things when you have free time.....quick lunch if time permits....I would also suggest doing the "little things" like filling her car up with gas...(my fiance does this for me and I

him for this) helping out around the house...seeing that item at a store that reminds you of you sweetie and getting it for her......giving affection for no reason but you love to do it...looking at her and telling her you love her......back rubs!
need any more suggestions just let me know! I have a million ideals!