Help!

So I have been dating this guy for a year and I couldn't be happier! But a while back we broke up for about a week or less and this other guy was being so sweet so we took him home one night and he held my hand and hugged me and my boyfriend found out.. He broke up with me and I don't know what to do! I want to be with him I don't want anyone but him but now he's ignoring me! What do I do?!