If what you're doing isn't having any response at all, then do what appears to make you and the kids the most comfortable. I found that when I journal and record what's happened in a given day (whether I see H or not) I can look back over it and come up with ideas based on how other's respond to me also. I've come to realize that my actions/mood sets the environment at home too. I know all of this seems small when you're looking for positive reactions, but they do add up.
As far as his kiss ot "meaning" anything, you're wrong. It meant something, just not what you wanted it to. The fact that you got a kiss and an acknowledgement of Valentine's Day is positive (regardless of how small).
You say money is tight and you can't start a hobby or class. How about walking or exercising at home or going to the library and picking up some books on cooking or gardening (or whatever floats your boat). This stuff doesn't have to cost anything outside of your budget. You should see what I can do with a pot of beans! Like you, money is an issue for me, so I find ways around it.