Hi, Dutchwalk,
The first four or five times I walked a Camino I walked with a very dear college friend. Then one year, after I had already booked my ticket, she had to cancel. I walked alone and since that time have walked alone on many different caminos, some so untravelled that I was totally alone and never met another pilgrim. If you had told me in the early years that I would wind up enjoying solitary walks, I would have told you no way. But I have found that it is a wonderful experience, and I relish it.
There are a lot of threads on the topic of walking alone that you can find by searching. Remember, too, that if you are walking in June on the Camino Francés, you will only be alone if you want to be. There will be lots of people all around you, in fact it may be hard to get some alone time! I think that everyone who goes back to repeat a Camino has to be careful about expectations and comparisons. Sounds like you know that it will be different, and different is frequently great! One way to make sure it's different is to do your stages differently so you don't stay in the same places. There is such an abundance of albergues and accommodation on the Camino Francés, so it's very easy to wind up in spending the evening and night in totally new places. Buen camino to you, and enjoy! Laurie