What kind of bike do you have?
Is it geared and how many?
You might want to consider posting a pic of you on the bike.
With some more info people here might be able to suggest some changes that might help now. Mostly though, just keep putting one pedal infront of the other and eventually you will see yourself do things you couldn't before. Most important make sure you keep enjoying it. If you don't enjoy it you will stop doing it. Also one good thing about hills is that they go down as well as up.