How do I know if he is still in love with me?

I was wondering how do I tell if my boyfriend of 3 years is still in love with me? He has never been a vocal person in conveying his love but he is very affectionate. I has been at least 8 months or so since he said I LOVE YOU without me saying it first. When I asked him why he havent said it in such a longtime...he said 'I dont know'
Is he in love or isnt he?

You can never know for sure. If he loves you he would always try and be there for you. Try and make you happy when you are sad.