For me, the abandonment, the guilt...and low self-esteem were just crushing issues.
I started dating again very quickly...less than 2 months after the incident. I wasn't perfectly ready, but I was ready enough. Waiting too long allows you to wallow in pity. I went on craigslist and put up and ad. I've dated something like 7 guys, including a couple repeats. They've all been really awesome, because I put up an interesting ad, and screened carefully.
Dating is a great excuse to dress really hot and have a guy drool over you. I realized that my boyfriend didn't abandon me because I sucked...after all, there were all these guys wanting to take me out again. Could they be wrong? Plus, I gained like 25lbs after the suicide, and these guys still thought I was hot (when I wasn't at my fighting weight). There is nothing wrong with looking for validation outside yourself, as long as it's not the only way you get it.