WHAT THE HELL IS GOING ON!! WHY IS HE ACTING LIKE THIS? WHO SHOULD EAT CROW AND MAKE THE FIRST CALL?

I'm in a sticky situation...I started dating this guy at work after almost 2 years of knowing him. He is a very sweet guy...perfect in every way. He stated that he had always admired me from afar but was too shy to make a move. When we first started dating which was about 3 months ago, we were inceperable, things were just moving way to fast, we were talking marriage, moving in together and babies...crazy fast. Due to the fact I work to jobs and have a 17 year old and a 15 year old, felt like I wasnt putting my all into the relationship and calling him and trying to see him started to turn into a chore and I became frustrated. I felt that since we couldn't spend quality time together and I deserved and he deserved all that a relationship has to offer that I should pull back and take a couple steps back. He wasn't to happy with my decsion even started crying on the phone and told me how much he loved me through the tears...I finally got him to accept that I just need time to reevaluate, but he was still being a little to clingy by coming into my office and asking me stupid questions just to hold a conversation with me. So then I just started focusing on my work and putting my all into my job. He says that I was being cold towards him which maybe I was...I just needed some space and time to think which he wasnt giving me like he said he would. But here is my problem the other day he forwarded to me a text message joke from an ex girlfriend of his at 1:00 in the morning! I specifically told him when we were in a relationship to never forward ANYTHING to me from your ex girlfriend. I said it is rude and disrespectfull. Also the other day he went to lunch with a female co-worker who is married. I came around the corner and here I see him and her getting out of his car! He is the type to hang with the girls at work, take cigarette breaks with them etc...and when we were toether he stopped hanging with the girls out of respect for me. I just couldn't believe that for a guy that was so distraught about me pulling back and I was doing it for OUR benefit that he would just dismiss what we had and go back to his old ways. I would think that to prove to me that he wanted me and only me and that we could get through this as a couple that he wouldn't be hanging with the girls and going to lunch. I am more mad then hurt...and I did text him the other day about him going to lunch with the co-worker...and he said...at least I know you still care about me because I can tell you were upset when you saw us!!! I told him I wasnt upset (I am not the jealous type) I was more hurt and mad!! I just dont know what to do...we don't talk anymore at the office he walks by all the time and I can see him looking in on me. Who is supposed to break this silence first him or me? Ok...grant it I did want space...but is it right for him to try to make me jealous...why is he doing this? Can someone help me and read into this situation and this mans mind. I am 36 and he is 27. Please don't judge me...no one in the office knows that we were dating...we were very private...but the tension you can cutt with a knife!! HELP