Most Helpful Guy
Believe it or not, personality and attitude IS important to many guys, more important than looks. Are their shallow guys who would never be with a fat girl? Absolutely. But plenty of guys want to date someone who cares for them and is good to them and compatible with them, and who has a pleasant personality and positive attitude, and their body type is far less important.
For the sake of honestly and completeness, I should also mention that *some* men may date or get with overweight women because those women have low self-esteem, or may be desperate for attention and validation, so it's easy for the guy to get sex, money, or to have her take care of him and the house and put up with his crap, because she'd rather do any of that then be alone. I'm not saying this is a large percentage of people, but it does exist, just as relationships where the man is used and abused, willingly, due to his low self esteem.
Another thing to keep in mind is that just because you've lost weight doesn't magically solve all of your problems. Guys STILL want a girl who is pleasant, positive, and fun, and while your new body may get more initial attention, it's your personality that will either keep them around or drive them away.