I wouldn't press him to give kisses if he doesn't want to, that seems like pushing personal boundaries in an unhealthy way. I was told I didn't kiss right as a child either, grew out of it eventually I guess. Though I've never been comfortable with kissing anyway, except my DH once in a while if I'm in the right mood for That kind. Kissing friends or relatives besides my own babies, while still babies, on the lips seems icky to me, and cheek kisses a bit awkward too, though I was raised around people who found it normal so it's personal not cultural.
The eating thing I would pay attention to, on the other hand. Giving him the chance to explore a variety of healthy foods, play with them even, and practice eating things in a low pressure fun situation would be priority. My middle son is tiny and it's hard to get food into him, I have to work hard every day to make sure he gets at least some veg and protein otherwise he would only have fruit, yogurt, and starches. Takes him forever to eat or drink anything.