You have a well crafted story here. The frantic pace of a romance that is set in the middle of the 'war' with Voldemort would be inappropriate here, and you've done a good job slowing it down with two wary people (teenage hormones notwithstanding). And while not strongly developed, you do have the conflict with the Weasleys, Remus, and Dumbledore to add some drama to the mix.
Author's response
- Thank you. The relationship (as you said, hormones not withstanding) is going to move slowly, no one is looking to end up bound forever...
- The conflict(s) will be explained starting about chapter 6 (maybe seven)