I love my man

I think I’m starting to fall in love with him and everything makes me sad. I wanna be with him alll the time and I don’t feel like that’s right 😥 idk I also get insecure about everything! The way I look the way I dress how I do my makeup and it’s not even him at all it’s just me and my head!! I guess I don’t want him to leave me like my ex boyfriend did I want to be with him forever idk this is weird I’m not use to this I guess I’m just venting but any suggestions or advice would be helpful