Why does this other man confuse me so much?

im married mother of 4 ,ive never ever took an interest nor looked at another man in 19 years that ive nown and been with my spouse but something happen this summer i developed feelings 4 another man nothing has happened just on and off talking flirting on and off and thats it and sometimes we totaly ignore each other why i dont no ,any ways 6 months ago i met this single father of 3 at the park are kids are freinds and go to classes to gether and sports v when we first started talking he seemed a little more then just interested and even invited me and the kids over then the question so u married , and ya i told him i was but not happly married and he still insisted on us comming over when we did he was cool but i didnt get out of the car we talked for an hour and i notice he never invited me in or to look a round why i dont no cause the vibes were there flirting and all well i let the kids stay for and hour and when i picked up the kids that was it he did not come out to talk to me . anyways i new id c him again at the park figuring hed approuch me again but didnt but to make along story short for 5 weeks he would stare at me which every one notice do bazzarr things or talk very loud behind me. sometimes we both would get the courage to say hi or wed get really like close and get into some heavy conversation but when ever that happens and things seem to be getting good we,ll then wright away were both playing the ignoring game why why its driving me crazy/// , finally at thhe end of the season he started getting more talkative with me and insisting i join soccer in a month with his kids and he even called a week after the season ended and we talked flirted and talked about him wanting to coach for soccer and baseball he even wanted to get with my kids and i a couple times a week to practice softball i was like cool but then as usuall he never called 5 weeks later soccer starts he comes up and nervously hugs me to say hi i was a little back offish because im a little cnfused and at the same time very attractied to him, now that soccer has started and almost ended hes trying to convence my daughter to join basket ball and me to to sign her up and to come over to his house that he will have the pappers for me and of course the seriouly hard core flirting along with it but now were not talking again im tired of this emotional roller coaster u no he takes a great interest in my kids and tells my daughter he can really work on her pitching and shows so much interest but then backs off on me and the tension feels so strong that it makes me sick whats up with this guy i dont get it i guess when my daughter spent the night last weekend his daughter said to him why dont u call michelle dad c what shes doing i guesse he replied why should i all she does is put me down ,u no im like what i tell my daughter is he crazy we just cleared the air on some issues and started being very talkative again and now this whats wrong here then of course he again does the not talking thing again here we are ignoring each other again so messed up and im sick over this with confusion