Could he be HIV positive?

Please hide my ID …I hv a two month old baby and my BF and I things we’re nt goin very well for the past 9 month of my pregnancy. He used to cheat and lie to me very much. I tested HIV positive on 2010 nd ever since I was taking treatment. My BF tested negative during that time and we continued sleeping together using condom until early last year when he told me tht he want to hv a baby with me. I ask him why would he want to have a baby while knowing that am positive? He told me that as long as I am taking treatment, the virus will not pass into his blood. We did have sex without protection last year nd I fell pregnant. After that he went to the clinic to do an HIV test nd he tested negative again. Is there any posibility that the virus is in his blood but the test cannot reveal it? I am really confused about this. Early this year, I just found out that he impregnated another girl. Will that girl test negative too? He then just broke-up with me and he says he will only support the baby and I should just get a man who has my same status lz help with advice.