You need to be prepared to be quite disappointed if he doesn't say it back.
Like another poster already mentioned. It kind of changes everything. If you two are on the same page and he says it back, great! Awesome. You two are officially love birds... awwwww.
If he doesn't say it back tho..... it's pretty much over. How awkward.
So, since this is the internet ill come out and briefly tell u what happened to me when I said it to someone like 2 years ago.... Kind of embarassing
I had been seeing this guy for like 9 months. Sex was awesome....prob the best part was the sex, he was cute, he was fun to be around, we hung out often, etc. I liked him......... a lot.
Anyway, about 8 months into it, i was pretty much bursting at the seams with "love" (ugh, vomit!) and I just HAD to tell him. He was quickly becoming my best friend. We were exclusive.... shit was real. I was feelin it big time. One night we rolled on some Molly together and just had the best night ever. Heavy petting, lots of laughing, kissing, making-out non-stop. full body massages. Very physical and fun night. Crazy. I couldn't get enough. I WAS in love.
So after that night of Molly and craziness he had to drop me off at the airport...I had to go on a work trip for a week.... Mind you, we were 8 to 9 months ino this, so I felt quite comfortable around him. As I'm getting out of the car.....and kissing him goodbye...I said "I love you"...... u know, so I could say it and then just leave off into the sunset full of love. lol.
Long story short about 10 days later we were broken up and not speaking..... Have not uttered a word to him since, nor has he to me....
When my flight landed he sent me this txt saying "i'm not mad u feel that way toward me"........ and I responded "ok"..... But I was disappointed, embarrassed, mortified really..I felt like we felt the same way toward eachother, obvs didnt. I didnt know what to say to him anymore. I had nothing to say anymore. Wasn't angry with him, but was angry at myself cuz I let myself fall like that. I legit still loved him, but knew he didnt feel the same way, so what was I to do? Just accept the fact and move on.
Anyway, exercise caution. you'll never how he feels til u say it. He could be totally waiting for u to say it to him.