Feeling suicidal.

Feeling depressed and alone lately. All the men in my life just use me for money and emotionally abuse me and move on to other women and treat them better than they treated me. This has been the case since I was 16...now I'm 31 and it's still going on. I feel all I have is myself. I just don't know what it is about me. A lot of females don't treat me any better. I have a crush on a guest in which another coworker is constantly trying to interfere on purpose because he expressed interest in me. Well today my job hired a very attractive girl and my female coworker was gloating in my face about it cause the guy who I like might find her attractive and stop trying to talk to me. I'm so hurt and I feel like no one cares.