Is it true the rich should not associate with the poor?

Joseph of Arimathea and Nicodemus were wealthy and generous people who associated with Jesus. Jesus was poor. Mutual social respect between the rich and the poor is important. 

If you enjoy someone's company, you should keep associating with them. At the end of the day, we are all people.

You aaked....

Isn't it written in the bible somewhere that you associate with your own class to feel comfortable?

And no its not.

Pray to God for an improvement in  your finances and see what comes of it. 

No. There is no verse in the Bible that says that. However, there are a plethora of verses that warn against the sin of self-righteousness.

The Bible is very clear that no one can earn their way to heaven since good works do not pay for sins. See Gal. 2:16, Rom. 3:23-28, 4:4-5, Eph. 2:8-9, Tit. 3:5. The only way to heaven is by believing in Jesus for His free gift of eternal life. Jesus shed His blood on the cross as the full payment for our sins. He did all the work; all He requires of us is that we believe in Him. Once you believe in Jesus Christ to save you, you are secure forever!

Because we have all sinned against a perfectly holy and righteous God, we all deserve eternal separation from God in hell (Rom. 6:23). However, God loves us so much that He sent His only Son Jesus to die on the cross as our Substitute so we don't have to go to hell. Christ died for our sins, was buried, and rose from the grave three days later (1 Cor. 15:3-4). He gives eternal life freely to anyone who simply believes in Him for it. No one can be saved by doing good works. Salvation is by grace alone through faith alone in Christ alone (Eph. 2:8-9).

"Verily, verily, I say unto you, He that believeth on me hath everlasting life" (John 6:47).

Finally the beggar died and was carried by the angels to be with Abraham in the place of the righteous dead the rich man also died and was barred and his soul went to hell  there in torment he saw Lazarus far with Abraham Father Abraham have pity send Lazarus over to dip the tip of his finger in water to cool my tongue But a Abraham said to him Son remember that during your lifetime you had everything you wanted and Lazarus had nothing So now he is here being comforted and you are in anguish. Luke 16:22,