This guy has been working at my local starbucks for about 2 years, has always seemed very nice/friendly saying hi how are you when ever he served me.

Went about 6 months ago and he made a comment saying I was well manned. Didn't really know how to respond so just thanks.
Then about a month or 2 later he said it again, I was a bit shocked so just said thanks again.

But ever since then he has been staring at me, started about 10 secs the first few weeks then increased to about 20-40 secs.

I only notice because I would look up from my drink/phone and he would be staring my way, I would look back down then look up in about 30secs and he would still be staring. I sometimes stared back for a few secs but most times look back down straight away.

Also when he stares at me, he stares at me like I'm the only one around.

Then sometimes when I go he will say hi how are you/how has your day been. Then other times he will completely ignore me like I don't even exist.

I went there tonight it was quiet when I arrived I went up to order and he was serving. He just said hi so I just said hi back and told him my order and paid.

I think of things to say/plan what I'm going to say when I get there. But as soon as I go up to the counter I get a bit/nervous shaky around him and freeze up when it comes to talking. But if he asks me how I am I can answer back.

When he just said hi was that my cue to ask how he was?
Or is he not talking to me because he doesn't like me any more, or does he think I don't like him back so has given up.

Also I was sat facing a way from him so couldn't see if he was staring
But a bit later on I went back up to get some water and when he served me he was smiling at me/looked happy to seem me again.

He could just of being happy about something that had just been said, but it did feel a bit like he had just been talking about me to someone or was thinking about me.

I really like him.

Is it to late to show/tell him I still like him.

If not what are some ways I can tell/show him I like him, without directly saying I like you would you like to to go on a date.

Also we do know each others names, and he does seem like a nice person.

I know it's part of working at Starbucks to be friendly but he just seems a bit more friendly/different around me than other customers, and someone who was just being friendly would not stare at you and you only for that long.

Also I don't sit there at staring at him he always seems to be staring at me when ever I look up from my drink

The next time you go in there be at the end of the line and then say Hi, ask how his day is going? See how it goes from there. Don't tell him you like him, that would be creepy. Have an actual conversation with him. Ask when he gets a break or if he is on Facebook or something.
How old are you?

Thanks.
I'm in my late teens

How old is he? He may be seeing you as a minor and that could be why he appears to ignore you sometime.

He's about same age as me 17-19, also I don't think he see's me as a minor as he knowns I'm studying nursing at college.
So do you think he likes me and is just to shy to tell me.
As he seems really confident around his other workmates/costumers and friends who come in, even other girls who he's friends with.

I don't know. He could be interested. The only way you can know is to talk to him, get to know him.