This many problems should not occur in anyone's life.

I don't really know where to start so here it goes... Hello everyone, My name is Ruby Whelan. I am 19 years old and live in the UK. I cannot remember when my problem began or why. I have a problem with controlling my emotions and I am prone to getting very depressed. I know that the recent attack of depression was caused by my long time partner and fiance was caught cheating on me. Now I wanted to work things out, but I needed to hear the truth, he said it was only a joke and he did not mean anything. But all my friends showed me the texts that he sent to THEM. To my FRIENDS. He even had the guts to send one to my BEST FRIEND. I am not mad though, well, not at him. I am mad at myself for not leaving him sooner. He then discovered I had found a new partner. Now I was happy. But he kept sending horrible messages and threatening to mess up my new partners car and make his life hell. I got very wound up. So I said to my partner and my friends that I am going to the Algarve for 10 days, to visit my father and to get away. Now this has brought on more depression from being away from the people I love and because my fathers new girlfriend hates me. I have tried to get on with her. She gives me evils or the cold shoulder. So I just tend to ignore her but it does hurt. I want my father to be happy, I mean why not, he was unhappy married to my mother. My mother is happy, he is happy so there is no problem, right? Wrong. It has now been discovered my father had affairs before he asked my mother for a divorce, claiming she had affairs... My family is a little messed up. Understatement... Back on the subject of my ex. He sent a text to one of my friends saying "I have just slept with another guy and loved it" Now I am not against gays or lesbians or Bi-Sexuals. I am Bi - sexual. But he went on to say "I am doing this to make Ruby upset. I am waiting for her relationship with Mike to fail and for her to run back to me" What? For one I would never run back to him in the first place and secondly I have my friends to support me. This text just made me even more repulsed. Another problem. I have a friend who has had a crush on me for about 4 years now... He will not stop telling me this. I think he is a great person. I get on really well with him. But I am in a relationship that I love. My partner and I are soul mates and best friends. I keep trying to tell my friend that, he says aww and then changes the subject very quickly, but it always comes back to him telling me he is interested. If there is someone out there who can help me sort out this mess in my head, I would be very grateful.