You need to get any poisons out of your life. Poison has many forms. Fix your heart, by staying away from anything that Allah (glorified and exalted be He) doesn’t love. If you are around friends that make you sin and make you disappoint Allah (glorified and exalted be He), then you need to get them out of your life.
On the authority of Abu Musa al-Ash'ari (radiyAllaahu 'anhu) The Prophet Muhammad (sallAllaahu 'alayhi wa sallam) said:
“A good friend and a bad friend are like a perfume-seller and a blacksmith: The perfume-seller might give you some perfume as a gift, or you might buy some from him, or at least you might smell its fragrance. As for the blacksmith, he might singe your clothes, and at the very least you will breathe in the fumes of the furnace.”
[Sahih Al-Bukhari: Vol 3, Hadith #314]