What your attachment style is doing isn't 'making you unsure about whether to stay in a relationship', or giving you a 'push-pull' issue that affects your relationships.
What your attachment style is doing is putting you in a position where, when things in a relationship feel off, or wrong, or uncomfortable, or anything else other than 'right', you feel that it might be because there is a fault in you, and that you need to fix it before you can see clearly what's going on.
If you remove that 'perhaps I'm faulty and need to fix myself', you're left with the truth. You have a relationship in which you sometimes feel good, and sometimes not, and that's not what you want.
I used to do the same thing. If my partner was unhappy with me, I felt myself to be at fault. If I was unhappy with my partner, I felt myself to be at fault. The fact is, nobody needs to be at fault. If you get bored watching action films, it's not action films' fault, or yours. If you get bored going swimming, it's not swimming's problem, and it's not yours. If you find apples boring to eat, it doesn't mean that you or apples need 'have a look at yourselves'. You have your preferences, and you make your choices accordingly, right?