Stop claiming people that you aren't official with. You're not owed anything
Lots of people in dating have this entitlement mentality where they expect their talking stage not to talk to other people but them only , the truth is people don't owe you exclusivity as long as they are not official and as long as you haven't had any discussion to do so, so you should just accept that this person is talking to other people and be cool with that. And a lot of people start asking questions that are non of their business like "why aren't you texting me" "whose that guy you were talking to etc" they don't owe you a conversation or a reply. If you can't accept this reality you're not ready for dating and fix your insecurities too cause this behavior is cause by insecurities and entitlement. This person has no business telling you about intimate details of their life or what their doing, the only thing you probably need to know is mental health and sexual reproductive health when you first meet someone.
And stop trying to make things work if they're not working, don't be too quick to fall in love, always remember that this is a journey and you'll bump through a few potholes before you get to the destination.
Deal with your jealousy issues.
Deal with your insecurities
Deal with you obsessiveness
Deal with your possessiveness
Deal with your low self esteem.