Well that's quite obvious but I woulda call him out on it and probably end things. If you gon mek comment like that on fb God only knows what he does when he's alone.
If I was talking to a girl dat long and was interested in her and felt like she was interested in me, if she DOESN'T TELL ME she going with another guy like that i would be done with her and make her kno. I'd prolly talk with her again after awhile. I'd not be happy with that for the most part tho.
If she come to me and wanna talk again about getting serious and it's not my kid and brings up me having to pay for child support, i would feel like she tryna take advantage of me and I will be done with her completely after that.