Our Actions as Adults in Relationships

I've had some horrible relationships with men: either they were not the one or some other reason. There's a guy that I'm really good friends with and I like him a lot and we got onto the subject of relationships and I told him I never wanted to be in another relationship again. He just laughed at me and told me I'm only saying that because I have not found the right man for me. So then I started wondering is there something wrong with me for picking these losers or was it how I was brought up: no father figure and an only child.