Hi everyone, I am sorry if this turns in to me whinging at any point but I really feel like i need to talk to someone and just release some tension

I have some deep issues which have remained unresolved and I'm not sure how to fix them, so just wondered if anyone had any advice. My dad had an affair when I was about 5, ran off with another woman...they ended up getting married and everything was happy and fine between everyone for about 10 years. Until the woman he ran off with had an affair with someone else a couple of years ago, destroying my dad, leaving me all bitter and twisted like again, making my mum upset again (who still has feelings for my dad). In addition, a few years ago a girl took my ex boyfriend of five years away from me... and now she has just started working at the place where my new boyfriend of 2 and a half years works. This has been bothering me quite a lot. I have always Always got these nasty worrying nagging thoughts in my head that bad things will happen and no matter what I do they are always there every day, like some kind of defence mechanism i suppose. I don't feel like myself, I feel like I'm stuck in some kind of 'black' is how i can best describe it. And I'm totally fed up with it. It's given me high blood pressure. Anyways sorry for the rambling on, I just needed it really
