I am currently in the best relationship I've ever been in. We've been together for just over a year and currently live together. We both love each other VERY much, we rarely argue and never yell, and we always have a great time together. We have great sex and have it often (3-8 times a week).
That said, I am a very insecure person and because of this I sometimes get insecure about our relationship for no reason at all. Even when our relationship and our sex life is going extremely well, I randomly get insecure about things. I start to think about her cheating on me - for no reason - and I get very upset. Even though inside I know that she isn't, thoughts just flood my head. Sometimes I get so worked up that I am visibly depressed and it affects our interactions. This will only last for a day but it's pointless and I feel like it's avoidable.
I have absolutely no reason to think like this. She shows me nothing but love and shows no signs that anything is wrong. I've accepted that this is all in my head but I just can't shake it. It was worse in the beginning of our relationship and I thought that it would eventually pass but it hasn't yet.
It's not just insecurity with regards to her cheating either. Sometimes it gets so bad that it's about sex too. There have been times that we've had sex and she's orgasmed 4, 5, 6, times... and I still feel inadequate when we're done.
Has anyone experienced anything like this? Do I need therapy? HELP!