I’m so confused!!!

Basically I’m dating this person who I won’t mention their real name but let’s say it’s ‘Alex’ and then there’s this other girl who we’ll call ‘Sam’ (ex).

I’ve been dating Alex for about 2 1/2 months now and I really like them, but about a month or so before that Sam and I had just broken up and I don’t think I’ve given myself enough time to fully get over her for good and in present time I’m realising that I think I still like Sam. I’m not sure what I should I do. I really like Alex, but I’m not sure how to handle/comprehend my feelings towards Sam. I’m not sure what I should I do?