Overthinking

So I have this fear that my relationships won’t work out because I overthink way too much. I sometimes fear that I️ may be the one pushing people out. Sometime I️ feel like I care tooo much to the point it feels like I️m smothering the guy. And so now I am in new relationship and we already have a month of dating. He is so sweet he shows me he cares and is really interested me but I always fear when something is tooo good something is going to happen. See this is the overthinking happening like I wish I can just shut my mind off and just allow myself to be happy and not act crazy. My mom recently asked me if I think I love him.. I told her no, but I like being with him. He makes me feel great safe and comfortable and I like a lot of things of him. Like when we are together I never would want to leave his side, I stare at him a lot and I do kiss him a lot but those are the little things I want him to like so it might annoy him but when I don’t do it he’ll miss it you know. Would that be a bother tho? Also recently now I’ve noticed that’s he getting a little too over protective like the other day I posted a picture of my coworkers for the holidays and there’s was one guy I posted with more than once.. and he didn’t like it like he was like not jealous but just saying like to not go out with the guy or whatever idk I thought it was kinda cute cus it showed me he does care but ehh kinda pushed me off edge. This is my first real relationship and I just need help on how to actually work things out. Like I told him I don’t like when he goes to sleep without telling me goodnight.. and he’s like oh sometimes I just knockout like today he was supposed to call me when he got home he didn’t & it got me mad bc I know if it was him he wouldn’t like it.. guys am I being crazy ?? Are these signs that I️m falling in love? How do you know when you’re actually falling because i don’t feel like in a trance or whatever ? I need tips suggestions ideas .. anyone else who has overthinking problems like me ?