U cannot change the past so why beat yourself up about it
it hasn't for me trust me i've had a messed up past. this is the only guy i have ever been with. been together for almost seven year we have two kids. but i am very surprise i haven't let the past mess everything i have now up.
It depends on how you interpret your past. Some people come away from a relationship at peace with it or at least feel they've learned from it. Others might just suppress the uncomfortableness of it and still deal with it in a new relationship.
No. But it always does.