It could or a part of you has given up on being jealous. jealousy is a very horrible emotion it can cause people to act in ways they wouldn't. You could still love him, but maybe in a new way or you could trust him more.
It depends. It could be that, or maybe you're just more mature now. Being less jealous usually shows that you trust the person. You're probably the only one who can tell whether you love somebody or not, though. You should think about it yourself. Meditation and deliberation can usually help sort out your feelings pretty nicely.
Well you do not fully love that person if you're constantly jealous. Jealousy is a side affect of distrust, and insecurity. You cannot fully love someone and them love you without trusting them 100%. So sounds like you're on the right path. Jealousy is a bad thing. If you can get past it...then you can let the love grow together.