Help

Hi guys, so I have been with my boyfriend for almost a year now, yay me. Its the first long term relationship I have ever been in and I think its built to last but I just kinda feel like the magic has died? I still love him and love spending time with him but I dont seen him as frequently as I used to. Am I doing something wrong or is it normal to feel this way after being together for a while? To make this more complicated a guy I used to be in love with for years but he never reciprocated has started to talk to me again and wants to spend time with me. I am certainly not as in love with him as I was but when I do occasionally see him I realise I still have some. I love my boyfriend and I dont want to leave him but I honestly just feel a bit lost? Thanks for your time guys.