why do i feel like this?😰

Me and my bf have been dating for seven months. He is a single father, has three young kids. I start feeling confused today about myself...i started asking questions to myself like: does he really love me like he really say it? Is he comparing me with his ex-wife? Am i enough woman for him? What if he thinks im too imature? I never had bf before and i feel like he already live a lot more than me and he even had a family now...so what does he really want from me, a noob person in this relationship world? I made love with him already...so what if he dont like the way i am in bed?... what if in the future we have a kid together and he dont get excited anymore? Like i told you, he already experience that kind of moment with his kids .. i would like to know what future has for me :(