I struggle with feeling I have pretty much left the christian faith, but not really wanting to commit to taking any alternative path through life. So though I would not be a "practicing christian" (involved in a church etc), I still have a fair bit of knowledge from books about christianity. But if I was a truly a believer then most of the time I don't feel like I am anymore
Salvation is not based on emotions (feelings) but on faith in Christ's work on the cross on your behalf, and trusting that He alone will save you.
but sometimes I do feel I might still be a christian but that I am just not myself at the moment.
Once a Christian (biblical standard), always saved. How do I know? Jesus taught that those who believe possess eternal life in John 5:24, 6:47. And the apostle John reiterated the same thing in 1 John 5:11 and 13.
Jesus also taught that believers are given eternal life and shall never perish. That means once a Christian, always saved.
I don't know what to do or how to return.
Any advice appreciated.
First, you need to figure out what you actually believe. What do you believe about Jesus Christ? Do you believe that He is the Son of God, who died on a cross for your sins, and gives those who believe in Him for salvation are given eternal life?
If you believe these things, then you ARE saved, whether you act like a Christian or not.
Next, you need to understand that faith in Christ makes you a child of God.
John 1:12 - Yet to all who did receive him, to those who believed in his name, he gave the right to become children of God—
Gal 3:26 - So in Christ Jesus you are all children of God through faith,
The result of becoming a child of God is that God the Father has every right and authority to DISCIPLINE His children. And that discipline is PAINFUL.
Heb 12:11 - No discipline seems pleasant at the time, but painful. Later on, however, it produces a harvest of righteousness and peace for those who have been trained by it.
The general pattern of God's discipline for His children is found in 1 Cor 11:30 - That is why many among you are weak and sick, and a number of you have fallen asleep (euphemism for physical death).
God's discipline is avoiding by being obedient to His commands. Just like human parenting.