Also don't forget Jason broke the engagement
Liz was willing then to make a life with him
Then Mikey was shot so after that yes she was willing to settle for seeing him in secret to protect the boys
Then we got the great straddle scenes and then them going to make a life together and wham the Russians
Jason was the one pushing her away cause imo he wanted it all and he was a coward.
Liz is guilty of KEEPING Lucky in her life and not seeing him for the abuser and user and manipulator he is. Same goes for Jason. Jason KNOWS who and what Lucky is now we are to buy he thinks Lucky is an ok guy and best choice for Jake. Face it Jason is just using Lucky and the Spencer name, which doesn't make sense and never did cause Lucky is not a safe choice in the least.
Both made mistakes and danger was the excuse tiic used to break them up time and time again.