I'm scared to smoke weed EDIT

My boyfriend smokes weed and so does his friends and my best friend. My boyfriend only smokes in my room like maybe less than 3 times in the past year we been together. The rest he either doesn't it before or after he sees me. I am not against it. The smell doesn't bother me. I heard that it can help with migraines and I have those so who knows it might help me. I'm 20 by the way and I know that it is illegal. All I'm asking is for advice. My boyfriend has never pressured me into smoking. He just says he would like if I did so I can hang out more with his friends and he think it might help me with my anxiety. I really don't know what it is that scares me to be honest. If I were to try I would want it to be with him because I truly trust him. Do you have any advice on this? What can I expect or how does it even all work?

Edit:

Thank you all. Some said that I shouldn't do it because of my boyfriend. He never even asked me. In fact I was the one that brought it up. It's actually my best friend that pressures me and my boyfriend is the one that says to only do it if I want to. I'm not much of a drinker so I guess I'm scare did how I might react with it. It's defitnetly one of those things were I have to try and see it for myself because everyone is different. Do you have any tips for first timers if I do decide to try?