What is love REALLY supposed to feel like?

WARNING: THIS WILL BE LONG

Ok I'm 25 and I feel like I'm too old to ask this question but it dawned on me the other day that I may not know what love REALLY feels like. I've had no shortage of boyfriends (and girlfriends) in my life, but the only time I can remember ever feeling like I was actually head over heels for someone was when I was 15 and I had a bf I used to do crazy things for. Like sneak out to see him or call back right after hanging up. I used to get little butterflies in my tummy just knowing I was going to see him. We were together almost 3 years and I was crushed after we ended. I don't remember ever feeling that way again, but were those feelings love or just my teenage hormones making me think it was? If it was the hormones then what am I supposed to be feeling as an adult?

Right now, I have a boyfriend I've been with for almost 8 years (on and off like twice). He's been practically perfect since we met. He's the only person I can honestly say has not once ever let me down. Here's the problem. When he's around, I smile and take comfort in the familiarity of being with him and I feel like i love him, we talk about marriage and children and our futures all the time, but when he's gone my mind starts to race with all these questions of doubt. "Do I love him because I'm in love with him or because Im comfortable with him?" "Is he really the one i should marry?" "Is this the way love is supposed to feel or am I missing out?" "Why am I having these questions now after so long?"

You see when we got together it was kind of sudden. I got kicked out of my parents house and he was nice enough to take me in (no strings attached). We were friends. I didnt have to sleep with him to live with him and I didnt feel the desire to so I didnt.... At first. We hung out as friends/roommates for months before we finally slept together. There was no sexual tension or anxiety or flirting or anything that built up to that point it just kinda happened one night. After that door was open it became a more frequent thing and eventually we decided to date. It was very "UN-dramatic". We rarely fought, sex was mediocre, and not much changed from when were just friends except a few extra dates. I had little to complain about. It's still kinda like that. We don't really fight and if we do it's usually cuz I have anger issues and don't know how to calm down (lol) . He does everything right. He's reliable, honest to a fault, loyal as a dog, he's a fantastic handyman around the house and with cars, he takes care of me and his family so well, and he doesnt talk to or even look at other females so I've never been suspicious or untrusting of him. He's never given me a reason to. You know he's pretty much the ideal man except his looks and sex skills are in the average department. I know real life isn't a movie. I'm not expecting this perfectly packaged "made for me" man to show up at my doorstep and make my heart pound uncontrollably like I'm some teenager again.

I guess what I want to know is am I with the right person? Is how I feel normal? Is this how love is supposes to feel? Comfortable? Or is love that happy butterfly feeling I felt as a teenager? Is it supposed to be exciting? Sometimes I feel like I might just be settling, but when I think about it there's really nothing for me to complain about. He really doesn't do anything wrong. If anything he does right by me more than anyone I know. Sometimes I even wonder if thats why Im still in this. Cuz I never found a good enough reason to leave?

Im a strong believer in lasting relationships and that most relationships these days end because people aren't willing to work through their differences so they just leave. So I'm desperately seeking an answer to my questions. Thanks for taking the time to read all this and help me out :)