He wants you to use it.
When a guy gives you his number, he is putting the onus on you to contact him. This is his way of avoiding getting too far ahead of himself in assuming that there is romantic interest on your part.
In essence, he may want to gauge just how interested you are in him. Hence, by giving you his number, he is testing that level of interest.
By contacting him, you would be confirming to him that you were truly interested as opposed to simply playing around.
A number of guys do this due to past experience.
They may have asked girls for their numbers in the past but would find themselves at the receiving end of a girl who either didn’t answer when they called or didn’t respond to a text.
There are a number of girls who do this.
They will give their phone number to a guy but when he calls or texts, they don’t answer or text back.
You may be dealing with a guy that has experienced this multiple times in the past.
Hence, he decides to start giving out his number instead. His intentions may be true.
He may truly be interested in the girl.
However, due to his past experience, he decides that it is better to give the girl his number and let her contact him if she is truly interested than take her number and be on the receiving end of no response.
This is one reason a guy would give you his number.
Another reason a guy would give you his number would be because he is in the process of talking to several women.
Yes, he may be one of those.
He may be the kind that leaves his number with as many women as possible in order to give himself the best opportunity at getting multiple contacts.
In essence, he is playing the numbers game.
He knows that the more women he gives his number to, the more likely he will get a response from some of them. Hence, he may be a player.
He may like giving himself as many options as possible.
This kind of method also puts a lot less demand on his time.
If he is not the one who has to do the calling or texting, that gives him a lot more time to find more women to give his number to.
Hence, he is really trying to manage his time as proficiently as possible in order to ensure that he spreads his opportunity to get contacted by as many women as possible.
Another reason why a guy would give you his number may be because he honestly isn’t quite sure about how he felt about the interaction with you.
He may have enjoyed it but at the same time, he may have felt like the chemistry wasn’t entirely there.
Hence, he is doubtful but still curious.
He decides to give you his number because he is not quite sure about this.
There was still a level of interest but it wasn’t strong enough for him to get so excited to ask you for your number.
As a result, he wouldn’t necessarily lose sleep if you didn’t contact him but he would still be game if you did.
He may give it another shot just to see if the chemistry is really there or if it can blossom.