Heartbroken lady needs your advice ...

I received this mail from a worried reader last night ..Kindly offer her advice if you can..
Hello admin God bless you for your good works .please help me post this because I need advice. 8 months back I met a guy through face book he lives in Holland, he showed interested nd we chatted and called each other everyday, I liked him. 3 months later I got a Facebook request when I added the lady who send me request in the pic I say  the guy in the pic holding a boy of about 3 yrs old .
I called him and asked him if he has a son and if he is married , he said the girl used to be his girlfriend that they are no longer together . I checked the girls page I say pics of another kid a girl of about 1yr he told me the girl is not his daughter that he baby girl belongs to his baby mama's mum. He said I should come over to Holland that he wants to introduce me to his family . So we kept chatting and calling my feelings for him grew stronger and stronger,he calls me at the middle of the night , early hours of the morning  so I doubt if he was living with his baby mama, he was talking About introduction  and whrere we will live after marriage . 
2 weeks later I called him at night the lady picked up the phone and she was like don't allow him deceive you that he is asleep  so I hung up.the next morning he called me I  asked him why he did not pick up his fone he said he was asleep in his brothers house  .I told him he was lying that his baby mama or whatever picked up the fone and told me stuffs. He said he went to visit his son when he was about leaving he boy was crying, that was why he slept over . We kept chatting and talking he invited me to Holland to meet his family but I refused to go. We found out that I have dated a guy he used to know. Out of a sudden he started acting strange does not really call me nor chat up with me , I told him to come to nigeria to see me he was light what is  he coming to do, that he has wasted his time to nigeria before because of a girl and it did not work out and all that, so I chilled a bit he has been acting funny for time now , I don't know if it's because I dated a guy he used to know before now .I really like him he is cool and handsome .I checked his FB page few weeks back and I saw the 2 kids the boy and the gal in his page . Please I need advice thanks