Grrr i need to calm down. help?

Ive had the best start to a relationship ever. im 24 and shes 26. we spent most days together, couldnt bear to be apart etc... now for some reason i feel im on a slide and i feel the confidence going...for no real reason. now if we argue i feel its going to be over, and i find myslef looking for more and more signs everything is ok (know sounds silly). maybe the honeymoon period is just over and things are settling down. i find myself waiting on texts during the day at work to keep my morale up and even those are getting less frequent and intense (again, prob the norm). i just want to stop the slide as the more i slip the more likely she is to pull away. she even tells me she loves me everyday. ive kinda talked to her about it but dont want to 100% as its not really attractive and think will makes matters worse. so are these things normal as i dont have loads of experience in long term releationships. do things just calm down, stay fun and dif from start