If you choose to be the person you are now, than yes probably. Listen, physical appearance isn't everything, I've known some relatively chubby guys that were not all that attractive that have far outdated me (not that I'm any prize, but in comparison I know I look better than them in the classic sense.)
How did they manage it? Well I'd have to go say sheer force of personality. The guys I'm thinking of were all funny, willing to take part in everything, out going and nice. One in particular I know (let's call him Dan), looks like a total goof. A bit overweight, acne scars and bad hair. He's always the first one to jump in with an idea if we get bored, as well as just a really nice guy. In the past year he's probably gotten laid 5x more than me (granted I've had some issues with an ex, so that has something to do with it). The point is, it's not all looks.
That said, looks are still important. Getting in shape and at least doing your best to look presentable are important. Protip:Women are much more likely to judge you on your clothes than on your face. I'm not joking. If you're wearing something that shows you just don't care about how you look (say a really baggy tshirt and baggy jeans), you're much more likely to get blown off than if you just look "average".
However ultimately it really does come down to you. You're not "destined" to be alone unless you choose to be. If you don't want to get in shape, or you're willing to make the effort to look good, than you clearly don't take pride in yourself.
If however you are willing to make the effort, confidence will come naturally as you start to look better. From someone who was once in a remarkably similar situation, your outside image really does affect your personality.