i'm in college now and i always try to focus only on my study and never think that i need a lover now
and i often doing some research with some of my friend, and among of my team, there's my classmate that called "H"
H ia a kind, diligent, and responsible man, he also share same interest with me, so we often chat together
and recently he insist to drove me home, however i've said i don't need it, but he keeps talk to me "its okay"
and recently when he drove me home, he also invite me to eat together, or go to the bookstore together
and the spreads the rumor that he love me, but he never confess his feeling to me by himself
but i don't feel the same thing, really
and this thing begin bother me, my mind such a mess and can't concentrate to do my study and research right now
if he really love me, i feel a bit guilty because he was so kind to me yet i can't reply his feeling
i keep thinking that its so fun to be his best friend, but i don't think i can accept him as a lover

and, if someday he really confess to me about his feelings, what should i do?

Just say you want to focus on studies and that you want just be friends. If thats really what you want. In worst case he will lose the interest into you but then you will clearly see if he is interested into you as a person or a lover.

Have a chat with him, face to face, and explain him your feelings inflexibly but nicely.

Just like what ^ they have said, stay calm and if he comes to you talk with him. Be kind and tell him you want to focus on studies or don't have the same feelings. I'm sure he'll understand. If you ever need anything we are here !

Thank you so much dear ><

You could hint at it that you don't have any feelings for him. Some guys are pretty dense so you might have to just outright tell him.

I had a similar problem, just it didn't progress too far. I think a guy at work likes me, but I'm kinda straight. He knows that I don't feel that way now though. I feel somewhat bad for not noticing it earlier, but that is just a part of life.

It doesn't sound like you gave an opening making him think you will return those feelings. Also if you are in college chances are this is not the first time he has been through rejection. So most likely, if he is mature enough, he can still be friends without letting his feelings get the better of himself.

Just don't encourage those feelings of his, by doing things that might make him think you like him. It is ultimately up to him if he can deal with those feelings and not act upon them. Respect his decision if he can't take it, but I think he most likely will be able to.

Friend-zone him. It's the most harsh way of ending a relationship before it has started.