love????

my boyfriend tells me he loves me and calls me princess all the time but when i ask why he loves me he says “it’s too complex i can’t explain.” wym??? i write him paragraphs at least once a week telling how much he means to me and i appreciate everything he does for me and how much i love him. i just don’t FEEL loved. i know he loves me in me head but i don’t feel it in my heart. would it be wrong for me to say that i just don’t feel loved? i’m always very open with my feelings like this but it seems like that might be too mean idk help