Trust

Ive been with my bf for about 8yrs on and off and we've both broken each others trust at times but i think things he has done are worse than things i have done..hes a bit older than me but i just cant forget some of the shit hes done and ultimately i dont trust him when it comes down to it..but i do love him..i just dont know how to get back to a place where i completely trust him and trust that hes not going to lie to me etc. helllllllpppp