boyfriend question major help?

My son's father left me n his son for two months came bac while dating someone that's fine well they broke up he got wit someone else he sends her a text "I've been thinking a lot about family" He sends me a text while in the same room.... asking me Wha I would say if he wanted our family together told him Wha have I told u from day one he told me to wait and see what happens I waited n was proving to him being loyal to him... I asked if he's back for good he told me yes asked while out taken our son for a walk if he was done liein to me he told me Wha do u think I told him Idk well I asked if him n his ex did anything to see if he was liein to me didn't really care if they did or didn't he told me they only kissed sent her a text from his phone n she told me the same thing

Should I try trusting him again after he's showin me he's changing??? Showing that he wants to b a family again???