Search Results: opening up emotionally

About a year and a half ago I met a guy while my then-boyfriend and I were on a "break". We had instant chemistry both physically & emotionally. However, it didn't last long because of external factors on both of our parts. We've kept in touch sporadically over the past year or so, and recently started hanging out again a few weeks ago.
It was the third time I had seen him since (last week) and we were laying on the couch watching a movie. Next thing I know he's showing me profiles of girls on POF! I was completely baffled. I mean I don't expect a damn commitment from him but come on! I shrugged it off and we ended up in bed anyway (as much as I hate to admit it, it is in fact one of many reasons I contacted him again). He spent the night and left for work in the morning. I, of course, spent the rest of the next day trying to figure out what he was thinking.
Sure enough he calls me during his lunch break just to say "hi" and to ask what I was doing later. I had no plans and told him so, and he responded with "okay so I'll see you later?" (I was okay with this since it seemed that he was more interested in the physical aspect and I'm not looking to jump into anything at the moment.)
When he showed up later that night, he had not only brought treats for my dog (who he knows I adore more than anything), but had brought over food to make us dinner. THEN after dinner we fell asleep together, something that we NEVER do except after sex. This morning he and I went to breakfast at his favorite place, which happens to be extremely out of the way for both of us.
To make a long story shorter, I thought we were doing the friends with benefits thing since he never seemed interested in pursuing a relationship (at least not back when we met). Now he's all about the PDA and wanting me to meet some of his friends and doing sweet boyfriend-y things like making dinner and bringing my pup treats and even opening car doors!
Am I crazy or am I getting mixed signals?

I like this guy a lot, but I worry that he doesn't feel like he can open up to me.

He's told me some of his basic likes/dislikes
He's told me that he was made fun of a lot in high school for being overweight
He said he cheated on a girl who refused to break up with him and ended up in therapy
He's self conscious about his weight/looks
He told me about the prior relationship he had and how it went horribly
He's told me about his family, where he's from, what his job is, what some of his major motivators are

Am I on the right track to intimacy with this guy or is he staying pretty closed off?