drewthesaltyboy,
If you are looking for an actual relationship- I wouldn't do it. Just think about it, and please don't rush into things.
"Age is a mentality. If two people have chemistry, then more power to them."- This statement is rather naive, and idiotic. Age is usually an key indicator on where you are in your life, we go through many different stages throughout: K-12, College, College + Internship, Career, More Schooling, Settling Down, Marriage, Pets, Kids, Etc.- Each of these stages starts to define us, mature us, and ideally make us who we are.
With him being just 18, he is just at the start of his life- The vary beginning. There's going to be so much that will lay ahead of him. So much to learn, and so much to see.
The other guy is already 28 he has a lot of his life already established. He also has the experience and knowledge of what it was like when he was first out of High School, he should respect and understand the stage of your life that he is in. Mentor him, guide him instead of what he is doing. I find it selfish, and highly immoral- I truly think that it lacks value. I do honestly think he would be lying to himself if he thinks something more will evolve from this. Personally, I would never be able to do that to someone.
Just watch his actions, not his words, and be careful. Sometimes words are meaningless, and sometimes they fool us into thinking that there is something more to what we have. It's nice to hear words like I love you, or other statements trying to describe what you think you might have. They flatter us and make us blind to what is truly in-front of us.
drewthesaltyboy, If you ever need to talk feel free to hit me up. Just be careful that's all I am saying.