Those people are not ones to rely on, because they are unreliable.
So, although things may be hard and challenging now and it may look as though your breakthrough is so far away, don't despair. God's promises still stand strong. He has plans for you. Plans to prosper you and not to harm you, plans to give you hope and a future (Jeremiah 29:11). He is going to come through for you. Just hold on to His Word and what He told you. Lean on Him and not flaky friends.
Hold on and by all means, continue your hustle.