I fear that in future i could be neglecting islam and become astray

[Caliphmj]

What should I do that i can be a faithful muslim for rest of my entire life like reminders.

 

[Mikail_Indonesia]

What should I do that i can be a faithful muslim for rest of my entire life like reminders.

It's the belief that you can't determine it. Only our Lord Allah has the ability to astray someone from Iman or give Iman.

My only advice is to assume positively to Allah, thats what I do when I have these doubts