Welcome to the STD forum. I'm sorry to hear of both the loss of your husband and your apparent bad luck with your first post-marital sex partner. But maybe that luck wasn't as bad as it seems, as discussed below. Some of your questions are social more than medical, but I'll try to address the medical and prevention aspects.
You don't say how your genital herpes was diagnosed, which would be helpful. Do you know whether you are infected with HSV-2 or HSV-1? Recurrent herpes on or near the genitals, including buttock lesions, probably is HSV-2, but it would be good to know for certain.
It is improbable that your initial infection actually involved your buttock. Even your apparently first outbreak probably was in fact a recurrence. Genital herpes almost always is acquired directly in the genital area, typically the labia minor or vaginal opening in women. That's because infection usually requires the virus to be massaged into the tissues, so that initial infection is pretty much limited to those areas that get the maximum friction during sex. And research shows that 40% of people with apparent initial herpes in fact have been infected for months or years. The initial infection is often entirely without symptoms. Or, if you ever had a past problem with unexplained genital pain, discomfort, sores, etc, that might have been the initial infection -- even if the symptoms were very mild.
For these reasons, it is not necessarily true that you caught herpes from your new partner. You might have been infected for years, perhaps even before your marriage; or perhaps you caught it from your husband. Have you discussed this with your new partner? Does he have known genital herpes? Has he been tested to see if he is infected with HSV-2? If not, that should be done -- if you still are with him, or at least in touch with him. If he has a positive HSV-2 blood test, he could have been the source of your infection, or he could have caught it from you. If negative, it will show he was not the source of your infection.
Having said all that, the rest of this response assumes you indeed have genital herpes, very likely due to HSV-2. To your specific questions:
a) You're not "cursed", as you undoubtedly realize. If indeed you were infected by your new partner, it was just bad luck, nothing more. In the US, around 20% of adults have HSV-2; most don't know it and therefore are not necessarily to blame when transmission occurs. If and when you follow my advice above to ask your partner to be HSV tested, it should be done with sensitivity in case he isn't aware, and without blame or accusation. (Of course this might be different if it turns out he knew he had herpes and never said anything about it.) As for chances of finding a new partnership, herpes can make it more difficult but by no means impossible. This is one of those social issues beyond the scope of this forum. However, excellent resources are available; see at the end of this reply.
b) There are few if any "implications" of suppressive therapy. The drugs are extremely safe, with no side effects for the vast majority of people, even after years of treatment. Aside from the cost, this really shouldn't be an issue for you.
c) As discussed above, you should assume your initial infection was genital, and that even without symptoms the virus is periodically present on or around the genital area and transmissible by sex.
d) All STDs are more common in populations like you describe. However, the difference is minor for herpes. Genital herpes is extremely common across all socioeconomic groups. You are not at all alone; plenty of people with genital herpes have had sexual lifestyles just like yours. As for "inexcusable", that's nonsense. In fact, herpes tends to occur MORE often in slightly older sexually active persons than younger ones; the rates of new infection are higher at age 25-35 than at 15-25.
Here are some resources for you. First are links to three other threads on this forum that address genital herpes symptoms, transmission, and diagnosis. Then there are links to the American Social Health Association and the Westover Heights Clinic of Portland, OR. They have excellent information, including personal counseling by phone (at ASHA), books and other written materials about living with herpes. (Disclosure: Dr. Hook and I are on ASHA's board of directors, and WHC is owned and run by Terri Warren, moderator of MedHelp's herpes forum.) Finally, MedHelp's herpes community forum is an excellent resource about the social and relationship aspects of herpes, moderated by highly experienced herpes counselors.
http://www.medhelp.org/posts/show/1090378
http://www.medhelp.org/posts/show/1129740
http://www.medhelp.org/posts/show/1137092
http://www.ashastd.org
http://www.westoverheights.com
Sorry for such a long response, but I think you'll find it helpful. I'm also going to bookmark it for future use in responding to other similar questions on this forum.
Best wishes-- HHH, MD