So we are switching topics.That scripture doesn't apply to miracles. Jesus even told His followers to go out and heal the sick, raise the dead, and cast out demons (in His name, by faith in Him). Miracles aren't a bad thing.
What I meant was that one shouldn't expect God to give everything they want. I think the scripture you quoted may have referred to spiritual, rather than material needs and that's possibly where our misunderstanding lies.
Otherwise, problems like persecution, hunger, unemployment or involuntary singledom would be nearly unexistent among Christians. While God may certainly help and support us in pursuing our earthly goals, most of the work will still fall on the individual and the world around them. In other words, if we seek the Lord with our hearts, our more spiritual and heavenly needs (like those related to self-improvement) will be fulfilled, but the more material and earthly ones (like those related to relationships which is the topic of this thread) may or may not, depending on factors outside of His control.