Answer:
That depends on the person (or guy). There are different types.
- Some guys show it without even needing to say it, just reading their body language and how they interact with you is one way to tell.
- Other guys have a way with hiding how they feel for people and making it unnoticeable, making it much harder to tell if they like you or not, but if you listen closely to what they say and how they say it, it may give you a hint.
But that's all I really know, hope that can help you a bit! ^^