My anxiety & OCD caused me to screw up my 1st two relationships. I kept getting bad thoughts in my head that wouldn't go away like that they were in trouble or that they were cheating on me or were going to leave me. It caused me to have bad panic attacks & I became controlling as a result. I'm not having the problems nearly as bad in my current relationship because I started anxiety & OCD medication before I got in it. It also helps that my current girlfriend is kind of clingy.