Bisexuals can be attracted more to one sex or the other, I am at least bi-curious and find women attractive however I don't think I could be in a long-term relationship with a women, unless it was an amazing match, I have a much higher preference to men. My sister is a lesbian however she can find men attractive to look at and find them great companions, but isn't interested sexually in them whatsoever, I think though that she would date a guy but I don't think it would last or go anywhere even if the match was great. I know this sounds very coarse and I don't mean any offense but if you are a guy, surely you must find them a little attractive to be able to get 'it' up? It sounds like you are negative towards the idea of finding men attractive and are uncomfortable about this within yourself. Without meaning to sound too patronizing, it's not wrong to like men whether just for casual sex or more, or just as friends and your choices do not reflect badly on you as a person, or a man. But if you are uncomfortable with choices you have made and continue to make, I would suggest to show yourself some forgiveness and move on, attempting not to make the same choices in the future - unless of course you change your mind.
I don't think that you have to be suicidal to be self-destructive - in fact most people who self-harm would say that they do so to feel alive/to remind them they are alive and the act of self-harming is in polar opposite to being suicidal. Of course I have to tell you what you may know, but not accept - It's not your fault that you were abused - no one should behave that way to another person. It's not a case of I allowed it. If someone robs a shop under the threat of personal injury - you don't blame the shop keeper for giving the money from the register - you blame the perpetrator of the crime. Worse still if the shop keeper got injured as well as robbed you still don't blame him. It's sad, but someone stole something from you and you were injured by it - you are not to blame. You are not less because of it. I hope that one day you can come to accept this fact and also that you learn to show yourself some compassion and forgiveness. You are only human.
It's good that you are aware that you see that you want acceptance from other men and I would suggest maybe leaving sex (especially casual sex) out of the equation with men and women - or just men if you would prefer, until you feel more settled within yourself and just try making new friends. It is kinder to yourself but also them too and is far more likely to acceptance and hopefully an emotional value that only comes with friendship. I don't know if you have ever been in a long term relationship and experienced all the benefits that can bring but maybe that is something you would prefer to aim for?
Also, I think that whether you (or anyone else) were abused, be it by women or by men, sexual or not sexual can damage you and your own self-image and make you question who you are, leave you confused by your feelings/choices and to develop hateful feelings of yourself. I think that yes, that can affect your natural sexuality on an emotional level but personally I don't believe it does on a physical level but if your sexuality has changed because of abuse you have suffered that is ok too. I also believe that your sexuality doesn't matter, you should make choices that make you happy and that feel right/good and whatever choices those are - they are the right ones.