I'm a 39 year old woman who has been single for 3 years now.. it's been very difficult for me I recently started a new job about 8 months ago and hit it off with a guy who I was sat next to. Hes 35 very chatty and flirty and we get on like a house on fire.theres something that's been really giggling me though. He has made out to me hes single but another girl who I recently got talking to told me hes not and was like well maybe hes having problems with her but I'm80%sure hes not
I did say to this him and he seemed very annoyed saying shes a liar and that when he started he was in a relationship with the mother of his two children but split up with her a year ago and says he doest tell anyone at work because "they're all nosy f**kers and use it against you"
This isnt all tho..he only sees me after work taking me out to lunch or to his mates flat because he lives far away from where our workplace is..sometimes we go to mine but he always rushes off.. he says it's because he lives far out which is true because this is common knowledge in his work. Our workplace is in the centre and he lives in a little outside village from the city. So I know hes not lying he also says he sometimes has his eldest come round after shes had her tea at her mums ?? I really really like him but in quite gutted because on Valentines day he didnt do anything except get me a card. I was hoping hed take me out and wed go out for a few drinks but nothing 
I dont know if he knew I was upset as he again said it's hard for him on weekends because he has the kids iv only ever seen him on a friday night and that's it..I wouldn't say were exclusive but we are seeing each other and everything is so good he makes me laugh, incredible sex etc I just dont know why hes not being more serious or exclusive? He sometimes snaps at me not to tell people at work. The only reason the other woman and me discussed him as she mentioned how he looked good with his new haircut I kind of accidentally on purpose made a joke saying well I'm sure someones snapped him up and that's when she said hes withsomeone...married or engaged i think" her exact words. He has no wedding ring on his fingers before anyone asks..i am so confused yet so upset. He gives me a quick call in the evenings only on some days then txts me around 9-10pm and says hes going to sleep . I hardly hear from him on weekends and when indo it's very rushed txting no phone calls.
What does everyone think? How do I approach this without him snapping or being put off? Its early days so I cant exactly ask him if hes lying to me I think hed be very turned off?