how do i know if it's love?

me and my boyfriend have been dating for a few months now (since late August) but we've been best friends (with benefits) and practically a couple for about two years now. I care about him a lot and I get jealous. I don't want anything bad to ever happen to him I take care of him I see him somewhere in my future. I wouldn't mind if he was the father of my kids. he's not a supermodel but he has his adorable moments and something definitely attracted me to him when we first started hanging out. I don't want it to be that we're just together because we're comfortable and used to each other. I know I love him like family but I don't know if it's more than that and I don't want to say I love you if I don't fully mean it or if I don't mean it that way. I think I love him. sometimes I think maybe there's something better out there but then I remember how amazing he is and all the good times we have together and how good he treats me and how we just click. I trust him so much and feel so close and comfortable with him (I wouldn't be surprised if someone thought we were too close). Does it sound like I love him or am I just comfortable with him? I want to love him and I want us to always be together but it's hard for me to figure out all my feelings.