Could be any number of MI's driving the compulsive thinking patterns. Blame has roots in a couple disorders.
If you felt oppressed by parents, could be symptomatic of Adult Child of Dysfunction, mix in Child of a person with a personality disorder, there's a plethora of combinations.
Religion as an oppressive tool in parenting isn't the only tool. Seeking that in love feeling, is just one feeling people seek.

Mentioning that your gf, would go after any woman that tried to take you, raises eyebrows [emoji782]