I need your opinions please!

just because he's not as active in ur relationship as he was at first doesn't mean he's found someone else. generally, the first few months of a relationship will be the "honeymoon period" where everything is perfect but that will often fade eventually. every relationship has problems at some point!

the important thing here is to talk about this in person, just let him know how ur feeling. he's making time for u so that's important too. things change! just make urself heard. (also, boys often post much less on social media so that may be why he hasn't posted anything!)

final note, given that u have only started dating recently, there's no reason to rush into anything such as marriage so quickly. u need to work on trusting him first! he's probably busy and just needs a little alone time every now and then, as we all do. not everyone is going to cheat, although that's what u hear most about in media. communication is important. talk to him first before u start making accusations. it'll be ok!

A person shouldn't have to tell you where they are and what they're doing all the time for you to be able to trust them, honestly, it can get quite exhausting.

Also, marriage?! You've been dating two months...