Aww begin don't get discouraged! Hugs to you.
You WILL find someone that you enjoy being with and that enjoys being with you! Remember also that online is only one of many ways to meet great people.
If the current site you're on isn't doing it for you, perhaps try a few others. Most men (IMO) are definitely attracted to a woman with confidence (no matter what size she is) so make sure that you are giving off an air of confidence on your profile, etc.
Have some fun with it, get creative in your approaches, and you may start to enjoy it a bit.
And be sure to let us know when you find a great guy, because I'd love to hear about it!