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I upvote valid comments, but never if they ask for it.

Ironically, you might have received an upvote on this comment and your other comment, but you don't because you asked for it.

It is generally considered poor form to beg for upvotes, and may even result in being flagged.

you're right. my friend what do you suggest me?

When you read posts, think of it as a conversation. Ponder what was written, and whether you have anything to add. Then respond with your side of the conversation.

Meaningful, well thought out comments that actually respond to the material of the post will usually get upvotes.