What should i do?

So im 20F and my boyfriend is 30M. We started dating over a month ago now. Dont get me wrong i got into this relationship because i really like him as a person. He’s kind, sweet, funny and has an amazing family. We have known each other for a while through my best friend which is his sister. We text every single day morning and night. For a little more context we are both busy people. He works Monday- Friday till 4 he then goes to the gym and studies his PT course till 8 and then sleeps. Then he is free Saturday and Sunday. Me on the other hand i have uni all week and then work on the weekends. So somehow naturally we came to a sort of agreement that we didn’t talk about it just happened that i stay over every Friday night. On the first Friday i stayed over we just chilled and watched a series but i was a little horny. So the next Friday i stayed over i initiated sex with him. Ever since then every single Friday we have sex. Which is initiated by him. Its great but im starting to feel a bit down and in my head about it. It’s starting to feel more like a Friday fuck then a relationship. As we haven’t gone out yet. But just last week he mentioned that he was off this Friday and is getting paid soon. So he has planned to go shopping for his little boys birthday. So i asked him if he was free maybe we could go out. He replied i dont see why not. But i have a feeling that he will pull out and say he is too tired and that i should just stay over so we can just chill instead. What should i do? Should i be straight with him and tell him im feeling this way? Im giving him the benefit of the doubt knowing he is busy. But because its so new i dont want to put any pressure on it but i feel like something has to give. His mum calls me her daughter in law and my best friend calls me her sister in law and sees her brother as my boyfriend but he doesn’t feel like my boyfriend if that makes sense. I like him i do but i can feel myself distancing myself. 😕

Am i right to feel this way i want someone else’s opinion.