What would you do ??????? Help any advice

I have been with my boyfriend almost a year now we are forever braking up an making up his 22 I'm 18 he also has a 2year old baby that he doesn't see very much he only just told me about this 3'months ago never mentioned anything about this i feel as he hides a lot of things from me it is hard for me to trust him fully, just wondering if you was in my shoes would you have stayed with him ? I do love him tho al this,???