Search Results: good intentions

He is of same origin as me but went abroad to study but I have been in my home town ever since. I'm very simple and have a small family of just me mom dad and my bro. We never saw or met each other in person but he wrote to me in FB which I ignored twice for a year and finally replied one fine day and after that we talked for 2 days all day and suddenly on day 2, he asked me for a serious relationship with intention to marry and I agreed. He also introduced me to his mom on the video call right after that on the same day ( after our second online date got over). We never sext-ed but we did talk about love, got to know each other fast track, our hobbies, education and career. It's funny that we are together since more than a year now 2020, 3rd April ( I was 23, he 24) we entered into a serious relationship ( he proposed to me). He is richer than me ( which I got to know later). His mom said me that at 26-27 you both will get married and both are very excited. I don't know sometimes how can anyone be so confident so fast? How can his mom/family be so confident for me? He is honest and loyal too and surprisingly I've been too. His dad and all relatives know of me too. Sometimes I used to be afraid if they're playing me or anything, but I tried to research to check if he is genuine and it turned out that he is. One thing is that he lied to me about the fact that his dad is in textiles but his dad is a director of a fortune 500 company. We talk less ( does not share his lifestyle ) but he keeps assuring me that he loves me may be so that I don't feel insecure or inferiority complexed. He tested me many times to make sure I'm not a gold digger ( which I'm not). I refused to take gifts or give one and anything else related to money and yesterday on a conference call with him and his mom, his mom keeps opening up to me like once in 6 months, of what all they have, slowly and I feel good but I don't express that I feel good and I'm like ok and then we end the call.

The guy I’m talking to, he had a 10 year relationship that recently ended but with me, he is saying that I seem perfect for him and he actually sees himself settling down with me and marrying me. I know his intentions are good.
but after 10 YEARS (they started dating at age 15-25 now), I think he’s going to want to date and sleep around and figure out what he’s missing. He’s in his prime!
how do I tell him I don’t think it’s best in the long run?
I don’t want to hop in a relationship with him and then have him resent me for taking away his prime years. help