I am writing to an old friend something like this:
Hello Dear xxx
It is a great pleasure to hearing from you again.
I am in touch with xxxx and xxxx. Both are still working in xxxx.
All the best my friend.
Can anyone proofread it?
Why in this case I have to use to hear and in other cases like these:
I look forward to hearing from you soon
I hope to hearing from you soon
have I to use to hearing? Because is it intended in future tense?