I have been dating my boyfriend for almost 4years. And for a while I would constantly ask about what he did with his ex. He lost his virginity to her but they only dated for like a week. She won't stop drinking and cheats on him. Then me and him date and we have been ever since. Recently he tells me about more stuff they did... like doing it in his truck and other stuff. I have always wanted to do stuff like that but for some reason I just can't let myself. And its stupid because I feel that her being so adventurous makes me look dull.I mean guys like when girls want to do them in public places. So I feel like she has one upped me. I mean I have been with him longer so I've done way more stuff than that with him but still. To add to my insecurities I was sick about two years ago and he while I am away gets her number and texts her. Because she use to be this crazy party person and not he heard she settled down and wanted to see why she changed for the guy she is with but not for him. But he didn't tell me I found out and really felt like it made me look like I was a fool. This guy is my first sexual partner. I do love him. But I can't stop thinking about all this. And he has mentioned lately he wants me if I'm interested to do a threesome with another guy. He thinks its hott and he thinks I need to be with another person besides him so I won't regret it later in life only being with one person. Any advice? On anything I have said?