To be honest with you it sounds like you have a much deeper rooted problem going on and maybe you don't even know one exists but this has been it's way of surfacing. I think you are covering up something much bigger that has nothing to do with dating/LGBT.
Being 20 years old may sound like you're too old to be conflicted about things but you're fine. Because you posted as Anonymous, I don't know if you're male or female, but in any case, I would advise you to just keep living your life. There is nothing wrong with you.
If you want to start dating and you're not sure how to go about it, find some hobby or interest that you have and investigate clubs or groups that get together that share your interest. Then you will be around folks that share this interest with you and you'll have a way to open a conversation with them.
You have a long life to live yet. At this moment in time, you're not interested in dating or having sexual encounter with anyone. Next year at this time, you could be at a different point in your life. It's all good.
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