<human>: Could you distill the essence of the text into 1-3 sentences?

Ive been dating my girlfriend for over 4 years now. We started dating at the end of high school and have been going strong ever since. 

We've been discussing the future for years and have our life together completely planned out. Everyone thinks we are great together and know that we are going to get married some day. 

The only problem is recently i've been really having trouble with the idea that I have never been with another woman and probably never will. The thought of being with another woman really excites me but I know I should repress this. I would would never cheat on her ever but its been hard for me to control how i've been thinking about other women. 

Of course i'm 22 and its totally natural to think about other women but i'm just concerned about the extent of it and if this feeling will go away when I get a little older and I am no longer in such a sexually volatile stage in life? 

Id love some feedback and advice and if you need anymore background info just let me know. 

Thanks!
<bot>: Been dating my GF for 4+ years, but thinking about being with other women quite often. Will this go away or just get worse?