<human>: Can you provide a brief overview of the text?

Hello r/relationships!

I met my SO, Kyle, on tinder. Yes I know, but it worked out amazingly for us. He's the most amazing man and although it is soon, we are madly in love.

Here lies the problem. I have been in one long term relationship before, which lasted for almost 4 years and ended in August. Kyle's longest relationship lasted for 1.5 years when he was about 18, and so he was in the dating/hookup scene mostly before he met me. I know it's very soon, but we have both expressed to each other that we can see each other being together for the rest of our lives. I have every intention of getting married to this man in a couple of years, and he returns these feelings. And I would like to point out I'm not the one who initially expressed this, it was him. However, a part of him is absolutely terrified of a long term relationship because he's entering entirely new territory. He constantly worries that he isn't good enough for me and that he isn't being a good enough boyfriend. 

I love this man, and I tell him constantly how much he means to me and how lucky I am to have him, but I can tell he's not buying it. He is an absolutely stunning human being, inside and out, and I'm worried he's idolizing me too much in his mind and that is what's scaring him. I've told him time and time again that I am not going anywhere but I feel like a part of him worries that if he fucks up I'm going to run.

Ladies and gents, is there anything I can do to help him be less scared? He's not balking on our relationship in any way and has made it clear how much I mean to him, but I really want to help him through this.
<bot>: SO is scared of a long term relationship because it's new territory for him and he worries about keeping me around. How can I reassure him I'm not going anywhere and help him be less scared?